]> jfr.im git - yt-dlp.git/blobdiff - youtube_dlc/extractor/youtube.py
Merge 'ytdl-org/youtube-dl/master' release 2020.11.19
[yt-dlp.git] / youtube_dlc / extractor / youtube.py
index 97cc793f9a20a2b864091f55007be2805aaa01f3..bbd9b2c4cd40da7b4f7384707f042ce99ca33b07 100644 (file)
@@ -16,7 +16,6 @@
 from ..swfinterp import SWFInterpreter
 from ..compat import (
     compat_chr,
-    compat_HTTPError,
     compat_kwargs,
     compat_parse_qs,
     compat_urllib_parse_unquote,
     bool_or_none,
     clean_html,
     error_to_compat_str,
-    extract_attributes,
     ExtractorError,
     float_or_none,
-    get_element_by_attribute,
     get_element_by_id,
     int_or_none,
-    js_to_json,
     mimetype2ext,
     orderedSet,
     parse_codecs,
     unescapeHTML,
     unified_strdate,
     unsmuggle_url,
+    update_url_query,
     uppercase_escape,
     url_or_none,
     urlencode_postdata,
+    urljoin,
 )
 
 
@@ -70,9 +68,7 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
     # If True it will raise an error if no login info is provided
     _LOGIN_REQUIRED = False
 
-    _PLAYLIST_ID_RE = r'(?:PL|LL|EC|UU|FL|RD|UL|TL|PU|OLAK5uy_)[0-9A-Za-z-_]{10,}'
-    _INITIAL_DATA_RE = r'(?:window\["ytInitialData"\]|ytInitialData)\W?=\W?({.*?});'
-    _YTCFG_DATA_RE = r"ytcfg.set\(({.*?})\)"
+    _PLAYLIST_ID_RE = r'(?:(?:PL|LL|EC|UU|FL|RD|UL|TL|PU|OLAK5uy_)[0-9A-Za-z-_]{10,}|RDMM)'
 
     _YOUTUBE_CLIENT_HEADERS = {
         'x-youtube-client-name': '1',
@@ -297,147 +293,34 @@ def _real_initialize(self):
         if not self._login():
             return
 
+    _DEFAULT_API_DATA = {
+        'context': {
+            'client': {
+                'clientName': 'WEB',
+                'clientVersion': '2.20201021.03.00',
+            }
+        },
+    }
 
-class YoutubeEntryListBaseInfoExtractor(YoutubeBaseInfoExtractor):
-
-    def _find_entries_in_json(self, extracted):
-        entries = []
-        c = {}
-
-        def _real_find(obj):
-            if obj is None or isinstance(obj, str):
-                return
-
-            if type(obj) is list:
-                for elem in obj:
-                    _real_find(elem)
-
-            if type(obj) is dict:
-                if self._is_entry(obj):
-                    entries.append(obj)
-                    return
-
-                if 'continuationCommand' in obj:
-                    c['continuation'] = obj
-                    return
-
-                for _, o in obj.items():
-                    _real_find(o)
-
-        _real_find(extracted)
-
-        return entries, try_get(c, lambda x: x["continuation"])
-
-    def _entries(self, page, playlist_id, max_pages=None):
-        seen = []
-
-        yt_conf = {}
-        for m in re.finditer(self._YTCFG_DATA_RE, page):
-            parsed = self._parse_json(m.group(1), playlist_id,
-                                      transform_source=js_to_json, fatal=False)
-            if parsed:
-                yt_conf.update(parsed)
-
-        data_json = self._parse_json(self._search_regex(self._INITIAL_DATA_RE, page, 'ytInitialData'), None)
-
-        for page_num in range(1, max_pages + 1) if max_pages is not None else itertools.count(1):
-            entries, continuation = self._find_entries_in_json(data_json)
-            processed = self._process_entries(entries, seen)
-
-            if not processed:
-                break
-            for entry in processed:
-                yield entry
-
-            if not continuation or not yt_conf:
-                break
-            continuation_token = try_get(continuation, lambda x: x['continuationCommand']['token'])
-            continuation_url = try_get(continuation, lambda x: x['commandMetadata']['webCommandMetadata']['apiUrl'])
-            if not continuation_token or not continuation_url:
-                break
-
-            count = 0
-            retries = 3
-            while count <= retries:
-                try:
-                    # Downloading page may result in intermittent 5xx HTTP error
-                    # that is usually worked around with a retry
-                    data_json = self._download_json(
-                        'https://www.youtube.com%s' % continuation_url,
-                        playlist_id,
-                        'Downloading continuation page #%s%s' % (page_num, ' (retry #%d)' % count if count else ''),
-
-                        transform_source=uppercase_escape,
-                        query={
-                            'key': try_get(yt_conf, lambda x: x['INNERTUBE_API_KEY'])
-                        },
-                        data=str(json.dumps({
-                            'context': try_get(yt_conf, lambda x: x['INNERTUBE_CONTEXT']),
-                            'continuation': continuation_token
-                        })).encode(encoding='UTF-8', errors='strict'),
-                        headers={
-                            'Content-Type': 'application/json'
-                        }
-                    )
-                    break
-                except ExtractorError as e:
-                    if isinstance(e.cause, compat_HTTPError) and e.cause.code in (500, 503):
-                        count += 1
-                        if count <= retries:
-                            continue
-                    raise
-
-    def _extract_title(self, renderer):
-        title = try_get(renderer, lambda x: x['title']['runs'][0]['text'], compat_str)
-        if title:
-            return title
-        return try_get(renderer, lambda x: x['title']['simpleText'], compat_str)
-
-
-class YoutubePlaylistBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):
-    def _is_entry(self, obj):
-        return 'videoId' in obj
-
-    def _process_entries(self, entries, seen):
-        ids_in_page = []
-        titles_in_page = []
-        for renderer in entries:
-            video_id = try_get(renderer, lambda x: x['videoId'])
-            video_title = self._extract_title(renderer)
-
-            if video_id is None or video_title is None:
-                # we do not have a videoRenderer or title extraction broke
-                continue
-
-            video_title = video_title.strip()
-
-            try:
-                idx = ids_in_page.index(video_id)
-                if video_title and not titles_in_page[idx]:
-                    titles_in_page[idx] = video_title
-            except ValueError:
-                ids_in_page.append(video_id)
-                titles_in_page.append(video_title)
-
-        for video_id, video_title in zip(ids_in_page, titles_in_page):
-            yield self.url_result(video_id, 'Youtube', video_id, video_title)
-
-
-class YoutubePlaylistsBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):
-    def _is_entry(self, obj):
-        return 'playlistId' in obj
+    def _call_api(self, ep, query, video_id):
+        data = self._DEFAULT_API_DATA.copy()
+        data.update(query)
 
-    def _process_entries(self, entries, seen):
-        for playlist_id in orderedSet(try_get(r, lambda x: x['playlistId']) for r in entries):
+        response = self._download_json(
+            'https://www.youtube.com/youtubei/v1/%s' % ep, video_id=video_id,
+            note='Downloading API JSON', errnote='Unable to download API page',
+            data=json.dumps(data).encode('utf8'),
+            headers={'content-type': 'application/json'},
+            query={'key': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8'})
 
-            yield self.url_result(
-                'https://www.youtube.com/playlist?list=%s' % playlist_id, 'YoutubePlaylist')
+        return response
 
-    def _real_extract(self, url):
-        playlist_id = self._match_id(url)
-        webpage = self._download_webpage(url, playlist_id)
-        title = self._og_search_title(webpage, fatal=False)
-        return self.playlist_result(self._entries(webpage, playlist_id), playlist_id, title)
+    def _extract_yt_initial_data(self, video_id, webpage):
+        return self._parse_json(
+            self._search_regex(
+                r'(?:window\s*\[\s*["\']ytInitialData["\']\s*\]|ytInitialData)\s*=\s*({.+?})\s*;',
+                webpage, 'yt initial data'),
+            video_id)
 
 
 class YoutubeIE(YoutubeBaseInfoExtractor):
@@ -498,7 +381,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                          |(?:www\.)?cleanvideosearch\.com/media/action/yt/watch\?videoId=
                          )
                      )?                                                       # all until now is optional -> you can pass the naked ID
-                     ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
+                     (?P<id>[0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
                      (?!.*?\blist=
                         (?:
                             %(playlist_id)s|                                  # combined list/video URLs are handled by the playlist IE
@@ -662,7 +545,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             }
         },
         {
-            'url': 'https://www.youtube.com/watch?v=BaW_jenozKc&v=UxxajLWwzqY',
+            'url': 'https://www.youtube.com/watch?v=BaW_jenozKc&v=yZIXLfi8CZQ',
             'note': 'Use the first video ID in the URL',
             'info_dict': {
                 'id': 'BaW_jenozKc',
@@ -703,6 +586,24 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             },
             'skip': 'format 141 not served anymore',
         },
+        # DASH manifest with encrypted signature
+        {
+            'url': 'https://www.youtube.com/watch?v=IB3lcPjvWLA',
+            'info_dict': {
+                'id': 'IB3lcPjvWLA',
+                'ext': 'm4a',
+                'title': 'Afrojack, Spree Wilson - The Spark (Official Music Video) ft. Spree Wilson',
+                'description': 'md5:8f5e2b82460520b619ccac1f509d43bf',
+                'duration': 244,
+                'uploader': 'AfrojackVEVO',
+                'uploader_id': 'AfrojackVEVO',
+                'upload_date': '20131011',
+            },
+            'params': {
+                'youtube_include_dash_manifest': True,
+                'format': '141/bestaudio[ext=m4a]',
+            },
+        },
         # Controversy video
         {
             'url': 'https://www.youtube.com/watch?v=T4XJQO3qol8',
@@ -734,6 +635,27 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'age_limit': 18,
             },
         },
+        # video_info is None (https://github.com/ytdl-org/youtube-dl/issues/4421)
+        # YouTube Red ad is not captured for creator
+        {
+            'url': '__2ABJjxzNo',
+            'info_dict': {
+                'id': '__2ABJjxzNo',
+                'ext': 'mp4',
+                'duration': 266,
+                'upload_date': '20100430',
+                'uploader_id': 'deadmau5',
+                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/deadmau5',
+                'creator': 'Dada Life, deadmau5',
+                'description': 'md5:12c56784b8032162bb936a5f76d55360',
+                'uploader': 'deadmau5',
+                'title': 'Deadmau5 - Some Chords (HD)',
+                'alt_title': 'This Machine Kills Some Chords',
+            },
+            'expected_warnings': [
+                'DASH manifest missing',
+            ]
+        },
         # Olympics (https://github.com/ytdl-org/youtube-dl/issues/4431)
         {
             'url': 'lqQg6PlCWgI',
@@ -1072,10 +994,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             'url': 'sJL6WA-aGkQ',
             'only_matching': True,
         },
-        {
-            'url': 'https://www.youtube.com/watch?v=MuAGGZNfUkU&list=RDMM',
-            'only_matching': True,
-        },
         {
             'url': 'https://invidio.us/watch?v=BaW_jenozKc',
             'only_matching': True,
@@ -1127,73 +1045,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'skip_download': True,
             },
         },
-        {
-            # Youtube Music Auto-generated description
-            # Retrieve 'artist' field from 'Artist:' in video description
-            # when it is present on youtube music video
-            'url': 'https://www.youtube.com/watch?v=k0jLE7tTwjY',
-            'info_dict': {
-                'id': 'k0jLE7tTwjY',
-                'ext': 'mp4',
-                'title': 'Latch Feat. Sam Smith',
-                'description': 'md5:3cb1e8101a7c85fcba9b4fb41b951335',
-                'upload_date': '20150110',
-                'uploader': 'Various Artists - Topic',
-                'uploader_id': 'UCNkEcmYdjrH4RqtNgh7BZ9w',
-                'artist': 'Disclosure',
-                'track': 'Latch Feat. Sam Smith',
-                'album': 'Latch Featuring Sam Smith',
-                'release_date': '20121008',
-                'release_year': 2012,
-            },
-            'params': {
-                'skip_download': True,
-            },
-        },
-        {
-            # Youtube Music Auto-generated description
-            # handle multiple artists on youtube music video
-            'url': 'https://www.youtube.com/watch?v=74qn0eJSjpA',
-            'info_dict': {
-                'id': '74qn0eJSjpA',
-                'ext': 'mp4',
-                'title': 'Eastside',
-                'description': 'md5:290516bb73dcbfab0dcc4efe6c3de5f2',
-                'upload_date': '20180710',
-                'uploader': 'Benny Blanco - Topic',
-                'uploader_id': 'UCzqz_ksRu_WkIzmivMdIS7A',
-                'artist': 'benny blanco, Halsey, Khalid',
-                'track': 'Eastside',
-                'album': 'Eastside',
-                'release_date': '20180713',
-                'release_year': 2018,
-            },
-            'params': {
-                'skip_download': True,
-            },
-        },
-        {
-            # Youtube Music Auto-generated description
-            # handle youtube music video with release_year and no release_date
-            'url': 'https://www.youtube.com/watch?v=-hcAI0g-f5M',
-            'info_dict': {
-                'id': '-hcAI0g-f5M',
-                'ext': 'mp4',
-                'title': 'Put It On Me',
-                'description': 'md5:f6422397c07c4c907c6638e1fee380a5',
-                'upload_date': '20180426',
-                'uploader': 'Matt Maeson - Topic',
-                'uploader_id': 'UCnEkIGqtGcQMLk73Kp-Q5LQ',
-                'artist': 'Matt Maeson',
-                'track': 'Put It On Me',
-                'album': 'The Hearse',
-                'release_date': None,
-                'release_year': 2018,
-            },
-            'params': {
-                'skip_download': True,
-            },
-        },
         {
             'url': 'https://www.youtubekids.com/watch?v=3b8nCWDgZ6Q',
             'only_matching': True,
@@ -1455,7 +1306,7 @@ def _get_ytplayer_config(self, video_id, webpage):
             # https://github.com/ytdl-org/youtube-dl/pull/7599)
             r';ytplayer\.config\s*=\s*({.+?});ytplayer',
             r';ytplayer\.config\s*=\s*({.+?});',
-            r'ytInitialPlayerResponse\s*=\s*({.+?});var meta'
+            r'ytInitialPlayerResponse\s*=\s*({.+?});var meta'  # Needed???
         )
         config = self._search_regex(
             patterns, webpage, 'ytplayer.config', default=None)
@@ -1511,11 +1362,10 @@ def _get_automatic_captions(self, video_id, webpage):
             self._downloader.report_warning(err_msg)
             return {}
         try:
-            if "args" in player_config and "ttsurl" in player_config["args"]:
-                args = player_config['args']
-                caption_url = args['ttsurl']
+            args = player_config['args']
+            caption_url = args.get('ttsurl')
+            if caption_url:
                 timestamp = args['timestamp']
-
                 # We get the available subtitles
                 list_params = compat_urllib_parse_urlencode({
                     'type': 'list',
@@ -1571,24 +1421,13 @@ def make_captions(sub_url, sub_langs):
                 return captions
 
             # New captions format as of 22.06.2017
-            if "args" in player_config:
-                player_response = player_config["args"].get('player_response')
-            else:
-                # New player system (ytInitialPlayerResponse) as of October 2020
-                player_response = player_config
-
-            if player_response:
-                if isinstance(player_response, compat_str):
-                    player_response = self._parse_json(
-                        player_response, video_id, fatal=False)
-
-                renderer = player_response['captions']['playerCaptionsTracklistRenderer']
-                caption_tracks = renderer['captionTracks']
-                for caption_track in caption_tracks:
-                    if 'kind' not in caption_track:
-                        # not an automatic transcription
-                        continue
-                    base_url = caption_track['baseUrl']
+            player_response = args.get('player_response')
+            if player_response and isinstance(player_response, compat_str):
+                player_response = self._parse_json(
+                    player_response, video_id, fatal=False)
+                if player_response:
+                    renderer = player_response['captions']['playerCaptionsTracklistRenderer']
+                    base_url = renderer['captionTracks'][0]['baseUrl']
                     sub_lang_list = []
                     for lang in renderer['translationLanguages']:
                         lang_code = lang.get('languageCode')
@@ -1596,25 +1435,19 @@ def make_captions(sub_url, sub_langs):
                             sub_lang_list.append(lang_code)
                     return make_captions(base_url, sub_lang_list)
 
-                self._downloader.report_warning("Couldn't find automatic captions for %s" % video_id)
-                return {}
-
-            if "args" in player_config:
-                args = player_config["args"]
-
-                # Some videos don't provide ttsurl but rather caption_tracks and
-                # caption_translation_languages (e.g. 20LmZk1hakA)
-                # Does not used anymore as of 22.06.2017
-                caption_tracks = args['caption_tracks']
-                caption_translation_languages = args['caption_translation_languages']
-                caption_url = compat_parse_qs(caption_tracks.split(',')[0])['u'][0]
-                sub_lang_list = []
-                for lang in caption_translation_languages.split(','):
-                    lang_qs = compat_parse_qs(compat_urllib_parse_unquote_plus(lang))
-                    sub_lang = lang_qs.get('lc', [None])[0]
-                    if sub_lang:
-                        sub_lang_list.append(sub_lang)
-                return make_captions(caption_url, sub_lang_list)
+            # Some videos don't provide ttsurl but rather caption_tracks and
+            # caption_translation_languages (e.g. 20LmZk1hakA)
+            # Does not used anymore as of 22.06.2017
+            caption_tracks = args['caption_tracks']
+            caption_translation_languages = args['caption_translation_languages']
+            caption_url = compat_parse_qs(caption_tracks.split(',')[0])['u'][0]
+            sub_lang_list = []
+            for lang in caption_translation_languages.split(','):
+                lang_qs = compat_parse_qs(compat_urllib_parse_unquote_plus(lang))
+                sub_lang = lang_qs.get('lc', [None])[0]
+                if sub_lang:
+                    sub_lang_list.append(sub_lang)
+            return make_captions(caption_url, sub_lang_list)
         # An extractor error can be raise by the download process if there are
         # no automatic captions but there are subtitles
         except (KeyError, IndexError, ExtractorError):
@@ -1695,15 +1528,11 @@ def extract_id(cls, url):
     def _extract_chapters_from_json(self, webpage, video_id, duration):
         if not webpage:
             return
-        initial_data = self._parse_json(
-            self._search_regex(
-                r'window\["ytInitialData"\] = (.+);\n', webpage,
-                'player args', default='{}'),
-            video_id, fatal=False)
-        if not initial_data or not isinstance(initial_data, dict):
+        data = self._extract_yt_initial_data(video_id, webpage)
+        if not data or not isinstance(data, dict):
             return
         chapters_list = try_get(
-            initial_data,
+            data,
             lambda x: x['playerOverlays']
                        ['playerOverlayRenderer']
                        ['decoratedPlayerBarRenderer']
@@ -1937,8 +1766,8 @@ def extract_embedded_config(embed_webpage, video_id):
             age_gate = False
             # Try looking directly into the video webpage
             ytplayer_config = self._get_ytplayer_config(video_id, video_webpage)
-            args = ytplayer_config.get("args")
-            if args is not None:
+            if ytplayer_config:
+                args = ytplayer_config.get('args', {})
                 if args.get('url_encoded_fmt_stream_map') or args.get('hlsvp'):
                     # Convert to the same format returned by compat_parse_qs
                     video_info = dict((k, [v]) for k, v in args.items())
@@ -1953,11 +1782,16 @@ def extract_embedded_config(embed_webpage, video_id):
                     is_live = True
                 if not player_response:
                     player_response = extract_player_response(args.get('player_response'), video_id)
-            elif not player_response:
-                player_response = ytplayer_config
             if not video_info or self._downloader.params.get('youtube_include_dash_manifest', True):
                 add_dash_mpd_pr(player_response)
 
+        if not video_info and not player_response:
+            player_response = extract_player_response(
+                self._search_regex(
+                    r'ytInitialPlayerResponse\s*=\s*({.+?})\s*;', video_webpage,
+                    'initial player response', default='{}'),
+                video_id)
+
         def extract_unavailable_message():
             messages = []
             for tag, kind in (('h1', 'message'), ('div', 'submessage')):
@@ -2162,7 +1996,10 @@ def _extract_filesize(media_url):
 
                 if cipher:
                     if 's' in url_data or self._downloader.params.get('youtube_include_dash_manifest', True):
-                        ASSETS_RE = r'(?:"assets":.+?"js":\s*("[^"]+"))|(?:"jsUrl":\s*("[^"]+"))'
+                        ASSETS_RE = (
+                            r'<script[^>]+\bsrc=("[^"]+")[^>]+\bname=["\']player_ias/base',
+                            r'"jsUrl"\s*:\s*("[^"]+")',
+                            r'"assets":.+?"js":\s*("[^"]+")')
                         jsplayer_url_json = self._search_regex(
                             ASSETS_RE,
                             embed_webpage if age_gate else video_webpage,
@@ -2478,7 +2315,7 @@ def extract_meta(field):
 
         def _extract_count(count_name):
             return str_to_int(self._search_regex(
-                r'"accessibilityData":\{"label":"([\d,\w]+) %ss"\}'
+                r'-%s-button[^>]+><span[^>]+class="yt-uix-button-content"[^>]*>([\d,]+)</span>'
                 % re.escape(count_name),
                 video_webpage, count_name, default=None))
 
@@ -2656,44 +2493,43 @@ def decrypt_sig(mobj):
         }
 
 
-class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):
-    IE_DESC = 'YouTube.com playlists'
-    _VALID_URL = r"""(?x)(?:
-                        (?:https?://)?
-                        (?:\w+\.)?
-                        (?:
-                            (?:
-                                youtube(?:kids)?\.com|
-                                invidio\.us
-                            )
-                            /
-                            (?:
-                               (?:course|view_play_list|my_playlists|artist|playlist|watch|embed/(?:videoseries|[0-9A-Za-z_-]{11}))
-                               \? (?:.*?[&;])*? (?:p|a|list)=
-                            |  p/
-                            )|
-                            youtu\.be/[0-9A-Za-z_-]{11}\?.*?\blist=
-                        )
-                        (
-                            (?:PL|LL|EC|UU|FL|RD|UL|TL|PU|OLAK5uy_)?[0-9A-Za-z-_]{10,}
-                            # Top tracks, they can also include dots
-                            |(?:MC)[\w\.]*
-                        )
-                        .*
-                     |
-                        (%(playlist_id)s)
-                     )""" % {'playlist_id': YoutubeBaseInfoExtractor._PLAYLIST_ID_RE}
-    _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s'
-    _VIDEO_RE_TPL = r'href="\s*/watch\?v=%s(?:&amp;(?:[^"]*?index=(?P<index>\d+))?(?:[^>]+>(?P<title>[^<]+))?)?'
-    _VIDEO_RE = _VIDEO_RE_TPL % r'(?P<id>[0-9A-Za-z_-]{11})'
-    IE_NAME = 'youtube:playlist'
-    _YTM_PLAYLIST_PREFIX = 'RDCLAK5uy_'
-    _YTM_CHANNEL_INFO = {
-        'uploader': 'Youtube Music',
-        'uploader_id': 'music',  # or "UC-9-kyTW8ZkZNDHQJ6FgpwQ"
-        'uploader_url': 'https://www.youtube.com/music'
-    }
+class YoutubeTabIE(YoutubeBaseInfoExtractor):
+    IE_DESC = 'YouTube.com tab'
+    _VALID_URL = r'https?://(?:\w+\.)?(?:youtube(?:kids)?\.com|invidio\.us)/(?:(?:channel|c|user)/|(?:playlist|watch)\?.*?\blist=)(?P<id>[^/?#&]+)'
+    IE_NAME = 'youtube:tab'
+
     _TESTS = [{
+        # playlists, multipage
+        'url': 'https://www.youtube.com/c/ИгорьКлейнер/playlists?view=1&flow=grid',
+        'playlist_mincount': 94,
+        'info_dict': {
+            'id': 'UCqj7Cz7revf5maW9g5pgNcg',
+            'title': 'Игорь Клейнер - Playlists',
+            'description': 'md5:be97ee0f14ee314f1f002cf187166ee2',
+        },
+    }, {
+        # playlists, multipage, different order
+        'url': 'https://www.youtube.com/user/igorkle1/playlists?view=1&sort=dd',
+        'playlist_mincount': 94,
+        'info_dict': {
+            'id': 'UCqj7Cz7revf5maW9g5pgNcg',
+            'title': 'Игорь Клейнер - Playlists',
+            'description': 'md5:be97ee0f14ee314f1f002cf187166ee2',
+        },
+    }, {
+        # playlists, singlepage
+        'url': 'https://www.youtube.com/user/ThirstForScience/playlists',
+        'playlist_mincount': 4,
+        'info_dict': {
+            'id': 'UCAEtajcuhQ6an9WEzY9LEMQ',
+            'title': 'ThirstForScience - Playlists',
+            'description': 'md5:609399d937ea957b0f53cbffb747a14c',
+        }
+    }, {
+        'url': 'https://www.youtube.com/c/ChristophLaimer/playlists',
+        'only_matching': True,
+    }, {
+        # basic, single video playlist
         'url': 'https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc',
         'info_dict': {
             'uploader_id': 'UCmlqkdCBesrv2Lak1mF_MxA',
@@ -2703,6 +2539,7 @@ class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):
         },
         'playlist_count': 1,
     }, {
+        # empty playlist
         'url': 'https://www.youtube.com/playlist?list=PL4lCao7KL_QFodcLWhDpGCYnngnHtQ-Xf',
         'info_dict': {
             'uploader_id': 'UCmlqkdCBesrv2Lak1mF_MxA',
@@ -2712,71 +2549,92 @@ class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):
         },
         'playlist_count': 0,
     }, {
-        'note': 'Playlist with deleted videos (#651). As a bonus, the video #51 is also twice in this list.',
-        'url': 'https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',
+        # Home tab
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/featured',
         'info_dict': {
-            'title': '29C3: Not my department',
-            'id': 'PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',
-            'uploader': 'Christiaan008',
-            'uploader_id': 'ChRiStIaAn008',
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Home',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
         },
-        'playlist_count': 96,
+        'playlist_mincount': 2,
     }, {
-        'note': 'issue #673',
-        'url': 'PLBB231211A4F62143',
+        # Videos tab
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/videos',
         'info_dict': {
-            'title': '[OLD]Team Fortress 2 (Class-based LP)',
-            'id': 'PLBB231211A4F62143',
-            'uploader': 'Wickydoo',
-            'uploader_id': 'Wickydoo',
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Videos',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
         },
-        'playlist_mincount': 26,
+        'playlist_mincount': 975,
     }, {
-        'note': 'Large playlist',
-        'url': 'https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q',
+        # Videos tab, sorted by popular
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/videos?view=0&sort=p&flow=grid',
         'info_dict': {
-            'title': 'Uploads from Cauchemar',
-            'id': 'UUBABnxM4Ar9ten8Mdjj1j0Q',
-            'uploader': 'Cauchemar',
-            'uploader_id': 'Cauchemar89',
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Videos',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
         },
-        'playlist_mincount': 799,
+        'playlist_mincount': 199,
     }, {
-        'url': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',
+        # Playlists tab
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/playlists',
         'info_dict': {
-            'title': 'YDL_safe_search',
-            'id': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Playlists',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
         },
-        'playlist_count': 2,
-        'skip': 'This playlist is private',
+        'playlist_mincount': 17,
     }, {
-        'note': 'embedded',
-        'url': 'https://www.youtube.com/embed/videoseries?list=PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',
-        'playlist_count': 4,
+        # Community tab
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/community',
         'info_dict': {
-            'title': 'JODA15',
-            'id': 'PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',
-            'uploader': 'milan',
-            'uploader_id': 'UCEI1-PVPcYXjB73Hfelbmaw',
-        }
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Community',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
+        },
+        'playlist_mincount': 18,
     }, {
-        'url': 'http://www.youtube.com/embed/_xDOZElKyNU?list=PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',
-        'playlist_mincount': 485,
+        # Channels tab
+        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w/channels',
         'info_dict': {
-            'title': '2018 Chinese New Singles (11/6 updated)',
-            'id': 'PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',
-            'uploader': 'LBK',
-            'uploader_id': 'sdragonfang',
-        }
+            'id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
+            'title': 'lex will - Channels',
+            'description': 'md5:2163c5d0ff54ed5f598d6a7e6211e488',
+        },
+        'playlist_mincount': 138,
     }, {
-        'note': 'Embedded SWF player',
-        'url': 'https://www.youtube.com/p/YN5VISEtHet5D4NEvfTd0zcgFk84NqFZ?hl=en_US&fs=1&rel=0',
-        'playlist_count': 4,
+        'url': 'https://invidio.us/channel/UC23qupoDRn9YOAVzeoxjOQA',
+        'only_matching': True,
+    }, {
+        'url': 'https://www.youtubekids.com/channel/UCyu8StPfZWapR6rfW_JgqcA',
+        'only_matching': True,
+    }, {
+        'url': 'https://music.youtube.com/channel/UCT-K0qO8z6NzWrywqefBPBQ',
+        'only_matching': True,
+    }, {
+        'note': 'Playlist with deleted videos (#651). As a bonus, the video #51 is also twice in this list.',
+        'url': 'https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',
+        'info_dict': {
+            'title': '29C3: Not my department',
+            'id': 'PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',
+            'uploader': 'Christiaan008',
+            'uploader_id': 'UCEPzS1rYsrkqzSLNp76nrcg',
+        },
+        'playlist_count': 96,
+    }, {
+        'note': 'Large playlist',
+        'url': 'https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q',
         'info_dict': {
-            'title': 'JODA7',
-            'id': 'YN5VISEtHet5D4NEvfTd0zcgFk84NqFZ',
+            'title': 'Uploads from Cauchemar',
+            'id': 'UUBABnxM4Ar9ten8Mdjj1j0Q',
+            'uploader': 'Cauchemar',
+            'uploader_id': 'UCBABnxM4Ar9ten8Mdjj1j0Q',
         },
-        'skip': 'This playlist does not exist',
+        'playlist_mincount': 1123,
+    }, {
+        # even larger playlist, 8832 videos
+        'url': 'http://www.youtube.com/user/NASAgovVideo/videos',
+        'only_matching': True,
     }, {
         'note': 'Buggy playlist: the webpage has a "Load more" button but it doesn\'t have more videos',
         'url': 'https://www.youtube.com/playlist?list=UUXw-G3eDE9trcvY2sBMM_aA',
@@ -2784,9 +2642,22 @@ class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):
             'title': 'Uploads from Interstellar Movie',
             'id': 'UUXw-G3eDE9trcvY2sBMM_aA',
             'uploader': 'Interstellar Movie',
-            'uploader_id': 'InterstellarMovie1',
+            'uploader_id': 'UCXw-G3eDE9trcvY2sBMM_aA',
         },
         'playlist_mincount': 21,
+    }, {
+        # https://github.com/ytdl-org/youtube-dl/issues/21844
+        'url': 'https://www.youtube.com/playlist?list=PLzH6n4zXuckpfMu_4Ff8E7Z1behQks5ba',
+        'info_dict': {
+            'title': 'Data Analysis with Dr Mike Pound',
+            'id': 'PLzH6n4zXuckpfMu_4Ff8E7Z1behQks5ba',
+            'uploader_id': 'UC9-y-6csu5WGm29I7JiwpnA',
+            'uploader': 'Computerphile',
+        },
+        'playlist_mincount': 11,
+    }, {
+        'url': 'https://invidio.us/playlist?list=PLDIoUOhQQPlXr63I_vwF9GD8sAKh77dWU',
+        'only_matching': True,
     }, {
         # Playlist URL that does not actually serve a playlist
         'url': 'https://www.youtube.com/watch?v=FqZTN594JQw&list=PLMYEtVRpaqY00V9W81Cwmzp6N6vZqfUKD4',
@@ -2812,402 +2683,533 @@ class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):
         'skip': 'This video is not available.',
         'add_ie': [YoutubeIE.ie_key()],
     }, {
-        'url': 'https://youtu.be/yeWKywCrFtk?list=PL2qgrgXsNUG5ig9cat4ohreBjYLAPC0J5',
-        'info_dict': {
-            'id': 'yeWKywCrFtk',
-            'ext': 'mp4',
-            'title': 'Small Scale Baler and Braiding Rugs',
-            'uploader': 'Backus-Page House Museum',
-            'uploader_id': 'backuspagemuseum',
-            'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/backuspagemuseum',
-            'upload_date': '20161008',
-            'description': 'md5:800c0c78d5eb128500bffd4f0b4f2e8a',
-            'categories': ['Nonprofits & Activism'],
-            'tags': list,
-            'like_count': int,
-            'dislike_count': int,
-        },
-        'params': {
-            'noplaylist': True,
-            'skip_download': True,
-        },
-    }, {
-        # https://github.com/ytdl-org/youtube-dl/issues/21844
-        'url': 'https://www.youtube.com/playlist?list=PLzH6n4zXuckpfMu_4Ff8E7Z1behQks5ba',
-        'info_dict': {
-            'title': 'Data Analysis with Dr Mike Pound',
-            'id': 'PLzH6n4zXuckpfMu_4Ff8E7Z1behQks5ba',
-            'uploader_id': 'Computerphile',
-            'uploader': 'Computerphile',
-        },
-        'playlist_mincount': 11,
-    }, {
-        'url': 'https://youtu.be/uWyaPkt-VOI?list=PL9D9FC436B881BA21',
-        'only_matching': True,
-    }, {
-        'url': 'TLGGrESM50VT6acwMjAyMjAxNw',
-        'only_matching': True,
-    }, {
-        # music album playlist
-        'url': 'OLAK5uy_m4xAFdmMC5rX3Ji3g93pQe3hqLZw_9LhM',
-        'only_matching': True,
-    }, {
-        'url': 'https://invidio.us/playlist?list=PLDIoUOhQQPlXr63I_vwF9GD8sAKh77dWU',
+        'url': 'https://www.youtubekids.com/watch?v=Agk7R8I8o5U&list=PUZ6jURNr1WQZCNHF0ao-c0g',
         'only_matching': True,
     }, {
-        'url': 'https://www.youtubekids.com/watch?v=Agk7R8I8o5U&list=PUZ6jURNr1WQZCNHF0ao-c0g',
+        'url': 'https://www.youtube.com/watch?v=MuAGGZNfUkU&list=RDMM',
         'only_matching': True,
     }]
 
-    def _real_initialize(self):
-        self._login()
-
-    def extract_videos_from_page(self, page):
-        ids_in_page = []
-        titles_in_page = []
-
-        for item in re.findall(
-                r'(<[^>]*\bdata-video-id\s*=\s*["\'][0-9A-Za-z_-]{11}[^>]+>)', page):
-            attrs = extract_attributes(item)
-            video_id = attrs['data-video-id']
-            video_title = unescapeHTML(attrs.get('data-title'))
-            if video_title:
-                video_title = video_title.strip()
-            ids_in_page.append(video_id)
-            titles_in_page.append(video_title)
-
-        # Fallback with old _VIDEO_RE
-        self.extract_videos_from_page_impl(
-            self._VIDEO_RE, page, ids_in_page, titles_in_page)
-
-        # Relaxed fallbacks
-        self.extract_videos_from_page_impl(
-            r'href="\s*/watch\?v\s*=\s*(?P<id>[0-9A-Za-z_-]{11})', page,
-            ids_in_page, titles_in_page)
-        self.extract_videos_from_page_impl(
-            r'data-video-ids\s*=\s*["\'](?P<id>[0-9A-Za-z_-]{11})', page,
-            ids_in_page, titles_in_page)
-
-        return zip(ids_in_page, titles_in_page)
-
-    def _extract_mix_ids_from_yt_initial(self, yt_initial):
-        ids = []
-        playlist_contents = try_get(yt_initial, lambda x: x['contents']['twoColumnWatchNextResults']['playlist']['playlist']['contents'], list)
-        if playlist_contents:
-            for item in playlist_contents:
-                videoId = try_get(item, lambda x: x['playlistPanelVideoRenderer']['videoId'], compat_str)
-                if videoId:
-                    ids.append(videoId)
-        return ids
-
-    def _extract_mix(self, playlist_id):
-        # The mixes are generated from a single video
-        # the id of the playlist is just 'RD' + video_id
-        ids = []
-        yt_initial = None
-        last_id = playlist_id[-11:]
-        for n in itertools.count(1):
-            url = 'https://www.youtube.com/watch?v=%s&list=%s' % (last_id, playlist_id)
-            webpage = self._download_webpage(
-                url, playlist_id, 'Downloading page {0} of Youtube mix'.format(n))
-            new_ids = orderedSet(re.findall(
-                r'''(?xs)data-video-username=".*?".*?
-                           href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s''' % re.escape(playlist_id),
-                webpage))
-
-            # if no ids in html of page, try using embedded json
-            if (len(new_ids) == 0):
-                yt_initial = self._get_yt_initial_data(playlist_id, webpage)
-                if yt_initial:
-                    new_ids = self._extract_mix_ids_from_yt_initial(yt_initial)
-
-            # Fetch new pages until all the videos are repeated, it seems that
-            # there are always 51 unique videos.
-            new_ids = [_id for _id in new_ids if _id not in ids]
-            if not new_ids:
-                break
-            ids.extend(new_ids)
-            last_id = ids[-1]
-
-        url_results = self._ids_to_results(ids)
-
-        search_title = lambda class_name: get_element_by_attribute('class', class_name, webpage)
-        title_span = (
-            search_title('playlist-title')
-            or search_title('title long-title')
-            or search_title('title'))
-        title = clean_html(title_span)
-
-        if not title:
-            title = try_get(yt_initial, lambda x: x['contents']['twoColumnWatchNextResults']['playlist']['playlist']['title'], compat_str)
+    @classmethod
+    def suitable(cls, url):
+        return False if YoutubeLiveIE.suitable(url) else super(
+            YoutubeTabIE, cls).suitable(url)
+
+    def _extract_channel_id(self, webpage):
+        channel_id = self._html_search_meta(
+            'channelId', webpage, 'channel id', default=None)
+        if channel_id:
+            return channel_id
+        channel_url = self._html_search_meta(
+            ('og:url', 'al:ios:url', 'al:android:url', 'al:web:url',
+             'twitter:url', 'twitter:app:url:iphone', 'twitter:app:url:ipad',
+             'twitter:app:url:googleplay'), webpage, 'channel url')
+        return self._search_regex(
+            r'https?://(?:www\.)?youtube\.com/channel/([^/?#&])+',
+            channel_url, 'channel id')
 
-        return self.playlist_result(url_results, playlist_id, title)
+    @staticmethod
+    def _extract_grid_item_renderer(item):
+        for item_kind in ('Playlist', 'Video', 'Channel'):
+            renderer = item.get('grid%sRenderer' % item_kind)
+            if renderer:
+                return renderer
+
+    def _extract_video(self, renderer):
+        video_id = renderer.get('videoId')
+        title = try_get(
+            renderer,
+            (lambda x: x['title']['runs'][0]['text'],
+             lambda x: x['title']['simpleText']), compat_str)
+        description = try_get(
+            renderer, lambda x: x['descriptionSnippet']['runs'][0]['text'],
+            compat_str)
+        duration = parse_duration(try_get(
+            renderer, lambda x: x['lengthText']['simpleText'], compat_str))
+        view_count_text = try_get(
+            renderer, lambda x: x['viewCountText']['simpleText'], compat_str) or ''
+        view_count = str_to_int(self._search_regex(
+            r'^([\d,]+)', re.sub(r'\s', '', view_count_text),
+            'view count', default=None))
+        uploader = try_get(
+            renderer, lambda x: x['ownerText']['runs'][0]['text'], compat_str)
+        return {
+            '_type': 'url_transparent',
+            'ie_key': YoutubeIE.ie_key(),
+            'id': video_id,
+            'url': video_id,
+            'title': title,
+            'description': description,
+            'duration': duration,
+            'view_count': view_count,
+            'uploader': uploader,
+        }
 
-    def _extract_playlist(self, playlist_id):
-        url = self._TEMPLATE_URL % playlist_id
-        page = self._download_webpage(url, playlist_id)
-
-        # the yt-alert-message now has tabindex attribute (see https://github.com/ytdl-org/youtube-dl/issues/11604)
-        for match in re.findall(r'<div class="yt-alert-message"[^>]*>([^<]+)</div>', page):
-            match = match.strip()
-            # Check if the playlist exists or is private
-            mobj = re.match(r'[^<]*(?:The|This) playlist (?P<reason>does not exist|is private)[^<]*', match)
-            if mobj:
-                reason = mobj.group('reason')
-                message = 'This playlist %s' % reason
-                if 'private' in reason:
-                    message += ', use --username or --netrc to access it'
-                message += '.'
-                raise ExtractorError(message, expected=True)
-            elif re.match(r'[^<]*Invalid parameters[^<]*', match):
-                raise ExtractorError(
-                    'Invalid parameters. Maybe URL is incorrect.',
-                    expected=True)
-            elif re.match(r'[^<]*Choose your language[^<]*', match):
+    def _grid_entries(self, grid_renderer):
+        for item in grid_renderer['items']:
+            if not isinstance(item, dict):
                 continue
-            else:
-                self.report_warning('Youtube gives an alert message: ' + match)
-
-        playlist_title = self._html_search_regex(
-            r'(?s)<h1 class="pl-header-title[^"]*"[^>]*>\s*(.*?)\s*</h1>',
-            page, 'title', default=None)
+            renderer = self._extract_grid_item_renderer(item)
+            if not isinstance(renderer, dict):
+                continue
+            title = try_get(
+                renderer, lambda x: x['title']['runs'][0]['text'], compat_str)
+            # playlist
+            playlist_id = renderer.get('playlistId')
+            if playlist_id:
+                yield self.url_result(
+                    'https://www.youtube.com/playlist?list=%s' % playlist_id,
+                    ie=YoutubeTabIE.ie_key(), video_id=playlist_id,
+                    video_title=title)
+            # video
+            video_id = renderer.get('videoId')
+            if video_id:
+                yield self._extract_video(renderer)
+            # channel
+            channel_id = renderer.get('channelId')
+            if channel_id:
+                title = try_get(
+                    renderer, lambda x: x['title']['simpleText'], compat_str)
+                yield self.url_result(
+                    'https://www.youtube.com/channel/%s' % channel_id,
+                    ie=YoutubeTabIE.ie_key(), video_title=title)
+
+    def _shelf_entries_trimmed(self, shelf_renderer):
+        renderer = try_get(
+            shelf_renderer, lambda x: x['content']['horizontalListRenderer'], dict)
+        if not renderer:
+            return
+        # TODO: add support for nested playlists so each shelf is processed
+        # as separate playlist
+        # TODO: this includes only first N items
+        for entry in self._grid_entries(renderer):
+            yield entry
+
+    def _shelf_entries(self, shelf_renderer):
+        ep = try_get(
+            shelf_renderer, lambda x: x['endpoint']['commandMetadata']['webCommandMetadata']['url'],
+            compat_str)
+        shelf_url = urljoin('https://www.youtube.com', ep)
+        if not shelf_url:
+            return
+        title = try_get(
+            shelf_renderer, lambda x: x['title']['runs'][0]['text'], compat_str)
+        yield self.url_result(shelf_url, video_title=title)
 
-        _UPLOADER_BASE = r'class=["\']pl-header-details[^>]+>\s*<li>\s*<a[^>]+\bhref='
-        uploader = self._html_search_regex(
-            r'%s["\']/(?:user|channel)/[^>]+>([^<]+)' % _UPLOADER_BASE,
-            page, 'uploader', default=None)
-        mobj = re.search(
-            r'%s(["\'])(?P<path>/(?:user|channel)/(?P<uploader_id>.+?))\1' % _UPLOADER_BASE,
-            page)
-        if mobj:
-            uploader_id = mobj.group('uploader_id')
-            uploader_url = compat_urlparse.urljoin(url, mobj.group('path'))
-        else:
-            uploader_id = uploader_url = None
+    def _playlist_entries(self, video_list_renderer):
+        for content in video_list_renderer['contents']:
+            if not isinstance(content, dict):
+                continue
+            renderer = content.get('playlistVideoRenderer') or content.get('playlistPanelVideoRenderer')
+            if not isinstance(renderer, dict):
+                continue
+            video_id = renderer.get('videoId')
+            if not video_id:
+                continue
+            yield self._extract_video(renderer)
 
-        has_videos = True
+    def _video_entry(self, video_renderer):
+        video_id = video_renderer.get('videoId')
+        if video_id:
+            return self._extract_video(video_renderer)
 
-        if not playlist_title:
-            try:
-                # Some playlist URLs don't actually serve a playlist (e.g.
-                # https://www.youtube.com/watch?v=FqZTN594JQw&list=PLMYEtVRpaqY00V9W81Cwmzp6N6vZqfUKD4)
-                next(self._entries(page, playlist_id))
-            except StopIteration:
-                has_videos = False
+    def _post_thread_entries(self, post_thread_renderer):
+        post_renderer = try_get(
+            post_thread_renderer, lambda x: x['post']['backstagePostRenderer'], dict)
+        if not post_renderer:
+            return
+        # video attachment
+        video_renderer = try_get(
+            post_renderer, lambda x: x['backstageAttachment']['videoRenderer'], dict)
+        video_id = None
+        if video_renderer:
+            entry = self._video_entry(video_renderer)
+            if entry:
+                yield entry
+        # inline video links
+        runs = try_get(post_renderer, lambda x: x['contentText']['runs'], list) or []
+        for run in runs:
+            if not isinstance(run, dict):
+                continue
+            ep_url = try_get(
+                run, lambda x: x['navigationEndpoint']['urlEndpoint']['url'], compat_str)
+            if not ep_url:
+                continue
+            if not YoutubeIE.suitable(ep_url):
+                continue
+            ep_video_id = YoutubeIE._match_id(ep_url)
+            if video_id == ep_video_id:
+                continue
+            yield self.url_result(ep_url, ie=YoutubeIE.ie_key(), video_id=video_id)
 
-        playlist = self.playlist_result(
-            self._entries(page, playlist_id), playlist_id, playlist_title)
-        playlist.update({
-            'uploader': uploader,
-            'uploader_id': uploader_id,
-            'uploader_url': uploader_url,
-        })
-        if playlist_id.startswith(self._YTM_PLAYLIST_PREFIX):
-            playlist.update(self._YTM_CHANNEL_INFO)
+    def _post_thread_continuation_entries(self, post_thread_continuation):
+        contents = post_thread_continuation.get('contents')
+        if not isinstance(contents, list):
+            return
+        for content in contents:
+            renderer = content.get('backstagePostThreadRenderer')
+            if not isinstance(renderer, dict):
+                continue
+            for entry in self._post_thread_entries(renderer):
+                yield entry
 
-        return has_videos, playlist
+    @staticmethod
+    def _extract_next_continuation_data(renderer):
+        next_continuation = try_get(
+            renderer, lambda x: x['continuations'][0]['nextContinuationData'], dict)
+        if not next_continuation:
+            return
+        continuation = next_continuation.get('continuation')
+        if not continuation:
+            return
+        ctp = next_continuation.get('clickTrackingParams')
+        return {
+            'ctoken': continuation,
+            'continuation': continuation,
+            'itct': ctp,
+        }
 
-    def _check_download_just_video(self, url, playlist_id):
-        # Check if it's a video-specific URL
-        query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
-        video_id = query_dict.get('v', [None])[0] or self._search_regex(
-            r'(?:(?:^|//)youtu\.be/|youtube\.com/embed/(?!videoseries))([0-9A-Za-z_-]{11})', url,
-            'video id', default=None)
-        if video_id:
-            if self._downloader.params.get('noplaylist'):
-                self.to_screen('Downloading just video %s because of --no-playlist' % video_id)
-                return video_id, self.url_result(video_id, 'Youtube', video_id=video_id)
-            else:
-                self.to_screen('Downloading playlist %s - add --no-playlist to just download video %s' % (playlist_id, video_id))
-                return video_id, None
-        return None, None
+    @classmethod
+    def _extract_continuation(cls, renderer):
+        next_continuation = cls._extract_next_continuation_data(renderer)
+        if next_continuation:
+            return next_continuation
+        contents = renderer.get('contents')
+        if not isinstance(contents, list):
+            return
+        for content in contents:
+            if not isinstance(content, dict):
+                continue
+            continuation_ep = try_get(
+                content, lambda x: x['continuationItemRenderer']['continuationEndpoint'],
+                dict)
+            if not continuation_ep:
+                continue
+            continuation = try_get(
+                continuation_ep, lambda x: x['continuationCommand']['token'], compat_str)
+            if not continuation:
+                continue
+            ctp = continuation_ep.get('clickTrackingParams')
+            if not ctp:
+                continue
+            return {
+                'ctoken': continuation,
+                'continuation': continuation,
+                'itct': ctp,
+            }
 
-    def _real_extract(self, url):
-        # Extract playlist id
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError('Invalid URL: %s' % url)
-        playlist_id = mobj.group(1) or mobj.group(2)
+    def _entries(self, tab, identity_token):
+        continuation = None
+        slr_contents = try_get(tab, lambda x: x['sectionListRenderer']['contents'], list) or []
+        for slr_content in slr_contents:
+            if not isinstance(slr_content, dict):
+                continue
+            is_renderer = try_get(slr_content, lambda x: x['itemSectionRenderer'], dict)
+            if not is_renderer:
+                continue
+            isr_contents = try_get(is_renderer, lambda x: x['contents'], list) or []
+            for isr_content in isr_contents:
+                if not isinstance(isr_content, dict):
+                    continue
+                renderer = isr_content.get('playlistVideoListRenderer')
+                if renderer:
+                    for entry in self._playlist_entries(renderer):
+                        yield entry
+                    continuation = self._extract_continuation(renderer)
+                    continue
+                renderer = isr_content.get('gridRenderer')
+                if renderer:
+                    for entry in self._grid_entries(renderer):
+                        yield entry
+                    continuation = self._extract_continuation(renderer)
+                    continue
+                renderer = isr_content.get('shelfRenderer')
+                if renderer:
+                    for entry in self._shelf_entries(renderer):
+                        yield entry
+                    continue
+                renderer = isr_content.get('backstagePostThreadRenderer')
+                if renderer:
+                    for entry in self._post_thread_entries(renderer):
+                        yield entry
+                    continuation = self._extract_continuation(renderer)
+                    continue
+                renderer = isr_content.get('videoRenderer')
+                if renderer:
+                    entry = self._video_entry(renderer)
+                    if entry:
+                        yield entry
+
+            if not continuation:
+                continuation = self._extract_continuation(is_renderer)
+
+        headers = {
+            'x-youtube-client-name': '1',
+            'x-youtube-client-version': '2.20201112.04.01',
+        }
+        if identity_token:
+            headers['x-youtube-identity-token'] = identity_token
 
-        video_id, video = self._check_download_just_video(url, playlist_id)
-        if video:
-            return video
+        for page_num in itertools.count(1):
+            if not continuation:
+                break
+            browse = self._download_json(
+                'https://www.youtube.com/browse_ajax', None,
+                'Downloading page %d' % page_num,
+                headers=headers, query=continuation, fatal=False)
+            if not browse:
+                break
+            response = try_get(browse, lambda x: x[1]['response'], dict)
+            if not response:
+                break
 
-        if playlist_id.startswith(('RD', 'UL', 'PU')):
-            if not playlist_id.startswith(self._YTM_PLAYLIST_PREFIX):
-                # Mixes require a custom extraction process,
-                # Youtube Music playlists act like normal playlists (with randomized order)
-                return self._extract_mix(playlist_id)
-
-        has_videos, playlist = self._extract_playlist(playlist_id)
-        if has_videos or not video_id:
-            return playlist
-
-        # Some playlist URLs don't actually serve a playlist (see
-        # https://github.com/ytdl-org/youtube-dl/issues/10537).
-        # Fallback to plain video extraction if there is a video id
-        # along with playlist id.
-        return self.url_result(video_id, 'Youtube', video_id=video_id)
-
-
-class YoutubeChannelIE(YoutubePlaylistBaseInfoExtractor):
-    IE_DESC = 'YouTube.com channels'
-    _VALID_URL = r'https?://(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie|kids)?\.com|(?:www\.)?invidio\.us)/channel/(?P<id>[0-9A-Za-z_-]+)'
-    _TEMPLATE_URL = 'https://www.youtube.com/channel/%s/videos'
-    _VIDEO_RE = r'(?:title="(?P<title>[^"]+)"[^>]+)?href="/watch\?v=(?P<id>[0-9A-Za-z_-]+)&?'
-    IE_NAME = 'youtube:channel'
-    _TESTS = [{
-        'note': 'paginated channel',
-        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w',
-        'playlist_mincount': 91,
-        'info_dict': {
-            'id': 'UUKfVa3S1e4PHvxWcwyMMg8w',
-            'title': 'Uploads from lex will',
-            'uploader': 'lex will',
-            'uploader_id': 'UCKfVa3S1e4PHvxWcwyMMg8w',
-        }
-    }, {
-        'note': 'Age restricted channel',
-        # from https://www.youtube.com/user/DeusExOfficial
-        'url': 'https://www.youtube.com/channel/UCs0ifCMCm1icqRbqhUINa0w',
-        'playlist_mincount': 64,
-        'info_dict': {
-            'id': 'UUs0ifCMCm1icqRbqhUINa0w',
-            'title': 'Uploads from Deus Ex',
-            'uploader': 'Deus Ex',
-            'uploader_id': 'DeusExOfficial',
-        },
-    }, {
-        'url': 'https://invidio.us/channel/UC23qupoDRn9YOAVzeoxjOQA',
-        'only_matching': True,
-    }, {
-        'url': 'https://www.youtubekids.com/channel/UCyu8StPfZWapR6rfW_JgqcA',
-        'only_matching': True,
-    }]
+            continuation_contents = try_get(
+                response, lambda x: x['continuationContents'], dict)
+            if continuation_contents:
+                continuation_renderer = continuation_contents.get('playlistVideoListContinuation')
+                if continuation_renderer:
+                    for entry in self._playlist_entries(continuation_renderer):
+                        yield entry
+                    continuation = self._extract_continuation(continuation_renderer)
+                    continue
+                continuation_renderer = continuation_contents.get('gridContinuation')
+                if continuation_renderer:
+                    for entry in self._grid_entries(continuation_renderer):
+                        yield entry
+                    continuation = self._extract_continuation(continuation_renderer)
+                    continue
+                continuation_renderer = continuation_contents.get('itemSectionContinuation')
+                if continuation_renderer:
+                    for entry in self._post_thread_continuation_entries(continuation_renderer):
+                        yield entry
+                    continuation = self._extract_continuation(continuation_renderer)
+                    continue
 
-    @classmethod
-    def suitable(cls, url):
-        return (False if YoutubePlaylistsIE.suitable(url) or YoutubeLiveIE.suitable(url)
-                else super(YoutubeChannelIE, cls).suitable(url))
+            continuation_items = try_get(
+                response, lambda x: x['onResponseReceivedActions'][0]['appendContinuationItemsAction']['continuationItems'], list)
+            if continuation_items:
+                continuation_item = continuation_items[0]
+                if not isinstance(continuation_item, dict):
+                    continue
+                renderer = continuation_item.get('playlistVideoRenderer')
+                if renderer:
+                    video_list_renderer = {'contents': continuation_items}
+                    for entry in self._playlist_entries(video_list_renderer):
+                        yield entry
+                    continuation = self._extract_continuation(video_list_renderer)
+                    continue
 
-    def _build_template_url(self, url, channel_id):
-        return self._TEMPLATE_URL % channel_id
+            break
 
-    def _real_extract(self, url):
-        channel_id = self._match_id(url)
-
-        url = self._build_template_url(url, channel_id)
-
-        # Channel by page listing is restricted to 35 pages of 30 items, i.e. 1050 videos total (see #5778)
-        # Workaround by extracting as a playlist if managed to obtain channel playlist URL
-        # otherwise fallback on channel by page extraction
-        channel_page = self._download_webpage(
-            url + '?view=57', channel_id,
-            'Downloading channel page', fatal=False)
-        if channel_page is False:
-            channel_playlist_id = False
+    @staticmethod
+    def _extract_selected_tab(tabs):
+        for tab in tabs:
+            if try_get(tab, lambda x: x['tabRenderer']['selected'], bool):
+                return tab['tabRenderer']
         else:
-            channel_playlist_id = self._html_search_meta(
-                'channelId', channel_page, 'channel id', default=None)
-            if not channel_playlist_id:
-                channel_url = self._html_search_meta(
-                    ('al:ios:url', 'twitter:app:url:iphone', 'twitter:app:url:ipad'),
-                    channel_page, 'channel url', default=None)
-                if channel_url:
-                    channel_playlist_id = self._search_regex(
-                        r'vnd\.youtube://user/([0-9A-Za-z_-]+)',
-                        channel_url, 'channel id', default=None)
-        if channel_playlist_id and channel_playlist_id.startswith('UC'):
-            playlist_id = 'UU' + channel_playlist_id[2:]
-            return self.url_result(
-                compat_urlparse.urljoin(url, '/playlist?list=%s' % playlist_id), 'YoutubePlaylist')
-
-        channel_page = self._download_webpage(url, channel_id, 'Downloading page #1')
-        autogenerated = re.search(r'''(?x)
-                class="[^"]*?(?:
-                    channel-header-autogenerated-label|
-                    yt-channel-title-autogenerated
-                )[^"]*"''', channel_page) is not None
-
-        if autogenerated:
-            # The videos are contained in a single page
-            # the ajax pages can't be used, they are empty
-            entries = [
-                self.url_result(
-                    video_id, 'Youtube', video_id=video_id,
-                    video_title=video_title)
-                for video_id, video_title in self.extract_videos_from_page(channel_page)]
-            return self.playlist_result(entries, channel_id)
+            raise ExtractorError('Unable to find selected tab')
 
-        try:
-            next(self._entries(channel_page, channel_id))
-        except StopIteration:
-            alert_message = self._html_search_regex(
-                r'(?s)<div[^>]+class=(["\']).*?\byt-alert-message\b.*?\1[^>]*>(?P<alert>[^<]+)</div>',
-                channel_page, 'alert', default=None, group='alert')
-            if alert_message:
-                raise ExtractorError('Youtube said: %s' % alert_message, expected=True)
+    @staticmethod
+    def _extract_uploader(data):
+        uploader = {}
+        sidebar_renderer = try_get(
+            data, lambda x: x['sidebar']['playlistSidebarRenderer']['items'], list)
+        if sidebar_renderer:
+            for item in sidebar_renderer:
+                if not isinstance(item, dict):
+                    continue
+                renderer = item.get('playlistSidebarSecondaryInfoRenderer')
+                if not isinstance(renderer, dict):
+                    continue
+                owner = try_get(
+                    renderer, lambda x: x['videoOwner']['videoOwnerRenderer']['title']['runs'][0], dict)
+                if owner:
+                    uploader['uploader'] = owner.get('text')
+                    uploader['uploader_id'] = try_get(
+                        owner, lambda x: x['navigationEndpoint']['browseEndpoint']['browseId'], compat_str)
+                    uploader['uploader_url'] = urljoin(
+                        'https://www.youtube.com/',
+                        try_get(owner, lambda x: x['navigationEndpoint']['browseEndpoint']['canonicalBaseUrl'], compat_str))
+        return uploader
+
+    def _extract_from_tabs(self, item_id, webpage, data, tabs, identity_token):
+        selected_tab = self._extract_selected_tab(tabs)
+        renderer = try_get(
+            data, lambda x: x['metadata']['channelMetadataRenderer'], dict)
+        if renderer:
+            channel_title = renderer.get('title') or item_id
+            tab_title = selected_tab.get('title')
+            title = channel_title or item_id
+            if tab_title:
+                title += ' - %s' % tab_title
+            description = renderer.get('description')
+            playlist_id = renderer.get('externalId')
+        renderer = try_get(
+            data, lambda x: x['metadata']['playlistMetadataRenderer'], dict)
+        if renderer:
+            title = renderer.get('title')
+            description = None
+            playlist_id = item_id
+        playlist = self.playlist_result(
+            self._entries(selected_tab['content'], identity_token),
+            playlist_id=playlist_id, playlist_title=title,
+            playlist_description=description)
+        playlist.update(self._extract_uploader(data))
+        return playlist
 
-        return self.playlist_result(self._entries(channel_page, channel_id), channel_id)
+    def _extract_from_playlist(self, item_id, data, playlist):
+        title = playlist.get('title') or try_get(
+            data, lambda x: x['titleText']['simpleText'], compat_str)
+        playlist_id = playlist.get('playlistId') or item_id
+        return self.playlist_result(
+            self._playlist_entries(playlist), playlist_id=playlist_id,
+            playlist_title=title)
 
+    def _real_extract(self, url):
+        item_id = self._match_id(url)
+        url = compat_urlparse.urlunparse(
+            compat_urlparse.urlparse(url)._replace(netloc='www.youtube.com'))
+        # Handle both video/playlist URLs
+        qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        video_id = qs.get('v', [None])[0]
+        playlist_id = qs.get('list', [None])[0]
+        if video_id and playlist_id:
+            if self._downloader.params.get('noplaylist'):
+                self.to_screen('Downloading just video %s because of --no-playlist' % video_id)
+                return self.url_result(video_id, ie=YoutubeIE.ie_key(), video_id=video_id)
+            self.to_screen('Downloading playlist %s - add --no-playlist to just download video %s' % (playlist_id, video_id))
+        webpage = self._download_webpage(url, item_id)
+        identity_token = self._search_regex(
+            r'\bID_TOKEN["\']\s*:\s*["\'](.+?)["\']', webpage,
+            'identity token', default=None)
+        data = self._extract_yt_initial_data(item_id, webpage)
+        tabs = try_get(
+            data, lambda x: x['contents']['twoColumnBrowseResultsRenderer']['tabs'], list)
+        if tabs:
+            return self._extract_from_tabs(item_id, webpage, data, tabs, identity_token)
+        playlist = try_get(
+            data, lambda x: x['contents']['twoColumnWatchNextResults']['playlist']['playlist'], dict)
+        if playlist:
+            return self._extract_from_playlist(item_id, data, playlist)
+        # Fallback to video extraction if no playlist alike page is recognized
+        if video_id:
+            return self.url_result(video_id, ie=YoutubeIE.ie_key(), video_id=video_id)
+        # Failed to recognize
+        raise ExtractorError('Unable to recognize tab page')
 
-class YoutubeUserIE(YoutubeChannelIE):
-    IE_DESC = 'YouTube.com user videos (URL or "ytuser" keyword)'
-    _VALID_URL = r'(?:(?:https?://(?:\w+\.)?youtube\.com/(?:(?P<user>user|c)/)?(?!(?:attribution_link|watch|results|shared)(?:$|[^a-z_A-Z0-9%-])))|ytuser:)(?!feed/)(?P<id>[A-Za-z0-9_%-]+)'
-    _TEMPLATE_URL = 'https://www.youtube.com/%s/%s/videos'
-    IE_NAME = 'youtube:user'
 
+class YoutubePlaylistIE(InfoExtractor):
+    IE_DESC = 'YouTube.com playlists'
+    _VALID_URL = r'''(?x)(?:
+                        (?:https?://)?
+                        (?:\w+\.)?
+                        (?:
+                            (?:
+                                youtube(?:kids)?\.com|
+                                invidio\.us|
+                                youtu\.be
+                            )
+                            /.*?\?.*?\blist=
+                        )?
+                        (?P<id>%(playlist_id)s)
+                     )''' % {'playlist_id': YoutubeBaseInfoExtractor._PLAYLIST_ID_RE}
+    IE_NAME = 'youtube:playlist'
     _TESTS = [{
-        'url': 'https://www.youtube.com/user/TheLinuxFoundation',
-        'playlist_mincount': 320,
+        'note': 'issue #673',
+        'url': 'PLBB231211A4F62143',
         'info_dict': {
-            'id': 'UUfX55Sx5hEFjoC3cNs6mCUQ',
-            'title': 'Uploads from The Linux Foundation',
-            'uploader': 'The Linux Foundation',
-            'uploader_id': 'TheLinuxFoundation',
-        }
+            'title': '[OLD]Team Fortress 2 (Class-based LP)',
+            'id': 'PLBB231211A4F62143',
+            'uploader': 'Wickydoo',
+            'uploader_id': 'UCKSpbfbl5kRQpTdL7kMc-1Q',
+        },
+        'playlist_mincount': 29,
+    }, {
+        'url': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',
+        'info_dict': {
+            'title': 'YDL_safe_search',
+            'id': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',
+        },
+        'playlist_count': 2,
+        'skip': 'This playlist is private',
     }, {
-        # Only available via https://www.youtube.com/c/12minuteathlete/videos
-        # but not https://www.youtube.com/user/12minuteathlete/videos
-        'url': 'https://www.youtube.com/c/12minuteathlete/videos',
-        'playlist_mincount': 249,
+        'note': 'embedded',
+        'url': 'https://www.youtube.com/embed/videoseries?list=PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',
+        'playlist_count': 4,
         'info_dict': {
-            'id': 'UUVjM-zV6_opMDx7WYxnjZiQ',
-            'title': 'Uploads from 12 Minute Athlete',
-            'uploader': '12 Minute Athlete',
-            'uploader_id': 'the12minuteathlete',
+            'title': 'JODA15',
+            'id': 'PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',
+            'uploader': 'milan',
+            'uploader_id': 'UCEI1-PVPcYXjB73Hfelbmaw',
         }
     }, {
-        'url': 'ytuser:phihag',
-        'only_matching': True,
+        'url': 'http://www.youtube.com/embed/_xDOZElKyNU?list=PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',
+        'playlist_mincount': 982,
+        'info_dict': {
+            'title': '2018 Chinese New Singles (11/6 updated)',
+            'id': 'PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',
+            'uploader': 'LBK',
+            'uploader_id': 'UC21nz3_MesPLqtDqwdvnoxA',
+        }
     }, {
-        'url': 'https://www.youtube.com/c/gametrailers',
-        'only_matching': True,
+        'url': 'https://youtu.be/yeWKywCrFtk?list=PL2qgrgXsNUG5ig9cat4ohreBjYLAPC0J5',
+        'info_dict': {
+            'id': 'yeWKywCrFtk',
+            'ext': 'mp4',
+            'title': 'Small Scale Baler and Braiding Rugs',
+            'uploader': 'Backus-Page House Museum',
+            'uploader_id': 'backuspagemuseum',
+            'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/backuspagemuseum',
+            'upload_date': '20161008',
+            'description': 'md5:800c0c78d5eb128500bffd4f0b4f2e8a',
+            'categories': ['Nonprofits & Activism'],
+            'tags': list,
+            'like_count': int,
+            'dislike_count': int,
+        },
+        'params': {
+            'noplaylist': True,
+            'skip_download': True,
+        },
     }, {
-        'url': 'https://www.youtube.com/c/Pawe%C5%82Zadro%C5%BCniak',
+        'url': 'https://youtu.be/uWyaPkt-VOI?list=PL9D9FC436B881BA21',
         'only_matching': True,
     }, {
-        'url': 'https://www.youtube.com/gametrailers',
+        'url': 'TLGGrESM50VT6acwMjAyMjAxNw',
         'only_matching': True,
     }, {
-        # This channel is not available, geo restricted to JP
-        'url': 'https://www.youtube.com/user/kananishinoSMEJ/videos',
+        # music album playlist
+        'url': 'OLAK5uy_m4xAFdmMC5rX3Ji3g93pQe3hqLZw_9LhM',
         'only_matching': True,
     }]
 
     @classmethod
     def suitable(cls, url):
-        # Don't return True if the url can be extracted with other youtube
-        # extractor, the regex would is too permissive and it would match.
-        other_yt_ies = iter(klass for (name, klass) in globals().items() if name.startswith('Youtube') and name.endswith('IE') and klass is not cls)
-        if any(ie.suitable(url) for ie in other_yt_ies):
-            return False
-        else:
-            return super(YoutubeUserIE, cls).suitable(url)
+        return False if YoutubeTabIE.suitable(url) else super(
+            YoutubePlaylistIE, cls).suitable(url)
 
-    def _build_template_url(self, url, channel_id):
-        mobj = re.match(self._VALID_URL, url)
-        return self._TEMPLATE_URL % (mobj.group('user') or 'user', mobj.group('id'))
+    def _real_extract(self, url):
+        playlist_id = self._match_id(url)
+        qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        if not qs:
+            qs = {'list': playlist_id}
+        return self.url_result(
+            update_url_query('https://www.youtube.com/playlist', qs),
+            ie=YoutubeTabIE.ie_key(), video_id=playlist_id)
+
+
+class YoutubeYtUserIE(InfoExtractor):
+    _VALID_URL = r'ytuser:(?P<id>.+)'
+    _TESTS = [{
+        'url': 'ytuser:phihag',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        user_id = self._match_id(url)
+        return self.url_result(
+            'https://www.youtube.com/user/%s' % user_id,
+            ie=YoutubeTabIE.ie_key(), video_id=user_id)
 
 
 class YoutubeLiveIE(YoutubeBaseInfoExtractor):
@@ -3262,41 +3264,7 @@ def _real_extract(self, url):
         return self.url_result(base_url)
 
 
-class YoutubePlaylistsIE(YoutubePlaylistsBaseInfoExtractor):
-    IE_DESC = 'YouTube.com user/channel playlists'
-    _VALID_URL = r'https?://(?:\w+\.)?youtube\.com/(?:user|channel|c)/(?P<id>[^/]+)/playlists'
-    IE_NAME = 'youtube:playlists'
-
-    _TESTS = [{
-        'url': 'https://www.youtube.com/user/ThirstForScience/playlists',
-        'playlist_mincount': 4,
-        'info_dict': {
-            'id': 'ThirstForScience',
-            'title': 'ThirstForScience',
-        },
-    }, {
-        # with "Load more" button
-        'url': 'https://www.youtube.com/user/igorkle1/playlists?view=1&sort=dd',
-        'playlist_mincount': 70,
-        'info_dict': {
-            'id': 'igorkle1',
-            'title': 'Игорь Клейнер',
-        },
-    }, {
-        'url': 'https://www.youtube.com/channel/UCiU1dHvZObB2iP6xkJ__Icw/playlists',
-        'playlist_mincount': 17,
-        'info_dict': {
-            'id': 'UCiU1dHvZObB2iP6xkJ__Icw',
-            'title': 'Chem Player',
-        },
-        'skip': 'Blocked',
-    }, {
-        'url': 'https://www.youtube.com/c/ChristophLaimer/playlists',
-        'only_matching': True,
-    }]
-
-
-class YoutubeSearchIE(SearchInfoExtractor, YoutubePlaylistBaseInfoExtractor):
+class YoutubeSearchIE(SearchInfoExtractor, YoutubeBaseInfoExtractor):
     IE_DESC = 'YouTube.com searches'
     # there doesn't appear to be a real limit, for example if you search for
     # 'python' you get more than 8.000.000 results
@@ -3393,57 +3361,7 @@ class YoutubeSearchDateIE(YoutubeSearchIE):
     _SEARCH_PARAMS = 'CAI%3D'
 
 
-class YoutubeSearchURLIE(YoutubePlaylistBaseInfoExtractor):
-    IE_DESC = 'YouTube.com search URLs'
-    IE_NAME = 'youtube:search_url'
-    _VALID_URL = r'https?://(?:www\.)?youtube\.com/results\?(.*?&)?(?:search_query|q)=(?P<query>[^&]+)(?:[&]|$)'
-    _TESTS = [{
-        'url': 'https://www.youtube.com/results?baz=bar&search_query=youtube-dl+test+video&filters=video&lclk=video',
-        'playlist_mincount': 5,
-        'info_dict': {
-            'title': 'youtube-dl test video',
-        }
-    }, {
-        'url': 'https://www.youtube.com/results?q=test&sp=EgQIBBgB',
-        'only_matching': True,
-    }]
-
-    def _process_json_dict(self, obj, videos, c):
-        if "videoId" in obj:
-            videos.append(obj)
-            return
-
-        if "nextContinuationData" in obj:
-            c["continuation"] = obj["nextContinuationData"]
-            return
-
-    def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        query = compat_urllib_parse_unquote_plus(mobj.group('query'))
-        webpage = self._download_webpage(url, query)
-        return self.playlist_result(self._entries(webpage, query, max_pages=5), playlist_title=query)
-
-
-class YoutubeShowIE(YoutubePlaylistsBaseInfoExtractor):
-    IE_DESC = 'YouTube.com (multi-season) shows'
-    _VALID_URL = r'https?://(?:www\.)?youtube\.com/show/(?P<id>[^?#]*)'
-    IE_NAME = 'youtube:show'
-    _TESTS = [{
-        'url': 'https://www.youtube.com/show/airdisasters',
-        'playlist_mincount': 5,
-        'info_dict': {
-            'id': 'airdisasters',
-            'title': 'Air Disasters',
-        }
-    }]
-
-    def _real_extract(self, url):
-        playlist_id = self._match_id(url)
-        return super(YoutubeShowIE, self)._real_extract(
-            'https://www.youtube.com/show/%s/playlists' % playlist_id)
-
-
-class YoutubeFeedsInfoExtractor(YoutubePlaylistBaseInfoExtractor):
+class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
     """
     Base class for feed extractors
     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
@@ -3457,51 +3375,62 @@ def IE_NAME(self):
     def _real_initialize(self):
         self._login()
 
-    def _process_entries(self, entries, seen):
-        new_info = []
-        for v in entries:
-            v_id = try_get(v, lambda x: x['videoId'])
-            if not v_id:
-                continue
+    def _entries(self, page):
+        # The extraction process is the same as for playlists, but the regex
+        # for the video ids doesn't contain an index
+        ids = []
+        more_widget_html = content_html = page
+        for page_num in itertools.count(1):
+            matches = re.findall(r'href="\s*/watch\?v=([0-9A-Za-z_-]{11})', content_html)
 
-            have_video = False
-            for old in seen:
-                if old['videoId'] == v_id:
-                    have_video = True
-                    break
+            # 'recommended' feed has infinite 'load more' and each new portion spins
+            # the same videos in (sometimes) slightly different order, so we'll check
+            # for unicity and break when portion has no new videos
+            new_ids = list(filter(lambda video_id: video_id not in ids, orderedSet(matches)))
+            if not new_ids:
+                break
 
-            if not have_video:
-                new_info.append(v)
+            ids.extend(new_ids)
 
-        if not new_info:
-            return
+            for entry in self._ids_to_results(new_ids):
+                yield entry
 
-        seen.extend(new_info)
-        for video in new_info:
-            yield self.url_result(try_get(video, lambda x: x['videoId']), YoutubeIE.ie_key(), video_title=self._extract_title(video))
+            mobj = re.search(r'data-uix-load-more-href="/?(?P<more>[^"]+)"', more_widget_html)
+            if not mobj:
+                break
+
+            more = self._download_json(
+                'https://www.youtube.com/%s' % mobj.group('more'), self._PLAYLIST_TITLE,
+                'Downloading page #%s' % page_num,
+                transform_source=uppercase_escape,
+                headers=self._YOUTUBE_CLIENT_HEADERS)
+            content_html = more['content_html']
+            more_widget_html = more['load_more_widget_html']
 
     def _real_extract(self, url):
         page = self._download_webpage(
             'https://www.youtube.com/feed/%s' % self._FEED_NAME,
             self._PLAYLIST_TITLE)
-        return self.playlist_result(self._entries(page, self._PLAYLIST_TITLE),
-                                    playlist_title=self._PLAYLIST_TITLE)
+        return self.playlist_result(
+            self._entries(page), playlist_title=self._PLAYLIST_TITLE)
 
 
-class YoutubeWatchLaterIE(YoutubePlaylistIE):
+class YoutubeWatchLaterIE(InfoExtractor):
     IE_NAME = 'youtube:watchlater'
     IE_DESC = 'Youtube watch later list, ":ytwatchlater" for short (requires authentication)'
-    _VALID_URL = r'https?://(?:www\.)?youtube\.com/(?:feed/watch_later|(?:playlist|watch)\?(?:.+&)?list=WL)|:ytwatchlater'
+    _VALID_URL = r'https?://(?:www\.)?youtube\.com/feed/watch_later|:ytwatchlater'
 
     _TESTS = [{
-        'url': 'https://www.youtube.com/playlist?list=WL',
+        'url': 'https://www.youtube.com/feed/watch_later',
         'only_matching': True,
     }, {
-        'url': 'https://www.youtube.com/watch?v=bCNU9TrbiRk&index=1&list=WL',
+        'url': ':ytwatchlater',
         'only_matching': True,
     }]
 
     def _real_extract(self, url):
+        return self.url_result(
+            'https://www.youtube.com/playlist?list=WL', ie=YoutubeTabIE.ie_key())
         _, video = self._check_download_just_video(url, 'WL')
         if video:
             return video
@@ -3509,18 +3438,6 @@ def _real_extract(self, url):
         return playlist
 
 
-class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
-    IE_NAME = 'youtube:favorites'
-    IE_DESC = 'YouTube.com favourite videos, ":ytfav" for short (requires authentication)'
-    _VALID_URL = r'https?://(?:www\.)?youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
-    _LOGIN_REQUIRED = True
-
-    def _real_extract(self, url):
-        webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
-        playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, 'favourites playlist id')
-        return self.url_result(playlist_id, 'YoutubePlaylist')
-
-
 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
     IE_DESC = 'YouTube.com recommended videos, ":ytrec" for short (requires authentication)'
     _VALID_URL = r'https?://(?:www\.)?youtube\.com/feed/recommended|:ytrec(?:ommended)?'
@@ -3606,3 +3523,67 @@ def _real_extract(self, url):
         raise ExtractorError(
             'Incomplete YouTube ID %s. URL %s looks truncated.' % (video_id, url),
             expected=True)
+
+
+# Old extractors. Are these cases handled elsewhere?
+
+class YoutubeSearchURLIE(YoutubeSearchIE):
+    IE_DESC = 'YouTube.com search URLs'
+    IE_NAME = 'youtube:search_url'
+    _VALID_URL = r'https?://(?:www\.)?youtube\.com/results\?(.*?&)?(?:search_query|q)=(?P<query>[^&]+)(?:[&]|$)'
+    _TESTS = [{
+        'url': 'https://www.youtube.com/results?baz=bar&search_query=youtube-dl+test+video&filters=video&lclk=video',
+        'playlist_mincount': 5,
+        'info_dict': {
+            'title': 'youtube-dl test video',
+        }
+    }, {
+        'url': 'https://www.youtube.com/results?q=test&sp=EgQIBBgB',
+        'only_matching': True,
+    }]
+
+    def _process_json_dict(self, obj, videos, c):
+        if "videoId" in obj:
+            videos.append(obj)
+            return
+
+        if "nextContinuationData" in obj:
+            c["continuation"] = obj["nextContinuationData"]
+            return
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        query = compat_urllib_parse_unquote_plus(mobj.group('query'))
+        webpage = self._download_webpage(url, query)
+        return self.playlist_result(self._entries(webpage, query, max_pages=5), playlist_title=query)
+
+
+class YoutubeShowIE(InfoExtractor):
+    IE_DESC = 'YouTube.com (multi-season) shows'
+    _VALID_URL = r'https?://(?:www\.)?youtube\.com/show/(?P<id>[^?#]*)'
+    IE_NAME = 'youtube:show'
+    _TESTS = [{
+        'url': 'https://www.youtube.com/show/airdisasters',
+        'playlist_mincount': 5,
+        'info_dict': {
+            'id': 'airdisasters',
+            'title': 'Air Disasters',
+        }
+    }]
+
+    def _real_extract(self, url):
+        playlist_id = self._match_id(url)
+        return super(YoutubeShowIE, self)._real_extract(
+            'https://www.youtube.com/show/%s/playlists' % playlist_id)
+
+
+class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
+    IE_NAME = 'youtube:favorites'
+    IE_DESC = 'YouTube.com favourite videos, ":ytfav" for short (requires authentication)'
+    _VALID_URL = r'https?://(?:www\.)?youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
+    _LOGIN_REQUIRED = True
+
+    def _real_extract(self, url):
+        webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
+        playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, 'favourites playlist id')
+        return self.url_result(playlist_id, 'YoutubePlaylist')