]> jfr.im git - yt-dlp.git/blobdiff - yt_dlp/extractor/youtube.py
[cleanup] Misc
[yt-dlp.git] / yt_dlp / extractor / youtube.py
index fe0e7f38dc61816e7a30631bf2dbe1b268700190..65a6c043e0e19814f996a09a9be328f97b9096c3 100644 (file)
@@ -38,6 +38,7 @@
     format_field,
     int_or_none,
     intlist_to_bytes,
+    is_html,
     mimetype2ext,
     network_exceptions,
     orderedSet,
@@ -45,7 +46,9 @@
     parse_count,
     parse_duration,
     parse_iso8601,
+    parse_qs,
     qualities,
+    remove_end,
     remove_start,
     smuggle_url,
     str_or_none,
     unsmuggle_url,
     update_url_query,
     url_or_none,
-    urlencode_postdata,
     urljoin,
     variadic,
 )
 
 
-def parse_qs(url):
-    return compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+# any clients starting with _ cannot be explicity requested by the user
+INNERTUBE_CLIENTS = {
+    'web': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'WEB',
+                'clientVersion': '2.20210622.10.00',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 1
+    },
+    'web_embedded': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'WEB_EMBEDDED_PLAYER',
+                'clientVersion': '1.20210620.0.1',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 56
+    },
+    'web_music': {
+        'INNERTUBE_API_KEY': 'AIzaSyC9XL3ZjWddXya6X74dJoCTL-WEYFDNX30',
+        'INNERTUBE_HOST': 'music.youtube.com',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'WEB_REMIX',
+                'clientVersion': '1.20210621.00.00',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 67,
+    },
+    'web_creator': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'WEB_CREATOR',
+                'clientVersion': '1.20210621.00.00',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 62,
+    },
+    'android': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'ANDROID',
+                'clientVersion': '16.20',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 3,
+    },
+    'android_embedded': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'ANDROID_EMBEDDED_PLAYER',
+                'clientVersion': '16.20',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 55
+    },
+    'android_music': {
+        'INNERTUBE_API_KEY': 'AIzaSyC9XL3ZjWddXya6X74dJoCTL-WEYFDNX30',
+        'INNERTUBE_HOST': 'music.youtube.com',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'ANDROID_MUSIC',
+                'clientVersion': '4.32',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 21,
+    },
+    'android_creator': {
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'ANDROID_CREATOR',
+                'clientVersion': '21.24.100',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 14
+    },
+    # ios has HLS live streams
+    # See: https://github.com/TeamNewPipe/NewPipeExtractor/issues/680
+    'ios': {
+        'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'IOS',
+                'clientVersion': '16.20',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 5
+    },
+    'ios_embedded': {
+        'INNERTUBE_API_KEY': 'AIzaSyDCU8hByM-4DrUqRUYnGn-3llEO78bcxq8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'IOS_MESSAGES_EXTENSION',
+                'clientVersion': '16.20',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 66
+    },
+    'ios_music': {
+        'INNERTUBE_API_KEY': 'AIzaSyDK3iBpDP9nHVTk2qL73FLJICfOC3c51Og',
+        'INNERTUBE_HOST': 'music.youtube.com',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'IOS_MUSIC',
+                'clientVersion': '4.32',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 26
+    },
+    'ios_creator': {
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'IOS_CREATOR',
+                'clientVersion': '21.24.100',
+            },
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 15
+    },
+    # mweb has 'ultralow' formats
+    # See: https://github.com/yt-dlp/yt-dlp/pull/557
+    'mweb': {
+        'INNERTUBE_API_KEY': 'AIzaSyDCU8hByM-4DrUqRUYnGn-3llEO78bcxq8',
+        'INNERTUBE_CONTEXT': {
+            'client': {
+                'clientName': 'MWEB',
+                'clientVersion': '2.20210721.07.00',
+            }
+        },
+        'INNERTUBE_CONTEXT_CLIENT_NAME': 2
+    },
+}
+
+
+def build_innertube_clients():
+    third_party = {
+        'embedUrl': 'https://google.com',  # Can be any valid URL
+    }
+    base_clients = ('android', 'web', 'ios', 'mweb')
+    priority = qualities(base_clients[::-1])
+
+    for client, ytcfg in tuple(INNERTUBE_CLIENTS.items()):
+        ytcfg.setdefault('INNERTUBE_API_KEY', 'AIzaSyDCU8hByM-4DrUqRUYnGn-3llEO78bcxq8')
+        ytcfg.setdefault('INNERTUBE_HOST', 'www.youtube.com')
+        ytcfg['INNERTUBE_CONTEXT']['client'].setdefault('hl', 'en')
+        ytcfg['priority'] = 10 * priority(client.split('_', 1)[0])
+
+        if client in base_clients:
+            INNERTUBE_CLIENTS[f'{client}_agegate'] = agegate_ytcfg = copy.deepcopy(ytcfg)
+            agegate_ytcfg['INNERTUBE_CONTEXT']['client']['clientScreen'] = 'EMBED'
+            agegate_ytcfg['INNERTUBE_CONTEXT']['thirdParty'] = third_party
+            agegate_ytcfg['priority'] -= 1
+        elif client.endswith('_embedded'):
+            ytcfg['INNERTUBE_CONTEXT']['thirdParty'] = third_party
+            ytcfg['priority'] -= 2
+        else:
+            ytcfg['priority'] -= 3
+
+
+build_innertube_clients()
 
 
 class YoutubeBaseInfoExtractor(InfoExtractor):
     """Provide base functions for Youtube extractors"""
-    _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
-    _TWOFACTOR_URL = 'https://accounts.google.com/signin/challenge'
-
-    _LOOKUP_URL = 'https://accounts.google.com/_/signin/sl/lookup'
-    _CHALLENGE_URL = 'https://accounts.google.com/_/signin/sl/challenge'
-    _TFA_URL = 'https://accounts.google.com/_/signin/challenge?hl=en&TL={0}'
 
     _RESERVED_NAMES = (
-        r'channel|c|user|browse|playlist|watch|w|v|embed|e|watch_popup|shorts|'
-        r'movies|results|shared|hashtag|trending|feed|feeds|oembed|get_video_info|'
+        r'channel|c|user|playlist|watch|w|v|embed|e|watch_popup|'
+        r'shorts|movies|results|shared|hashtag|trending|feed|feeds|'
+        r'browse|oembed|get_video_info|iframe_api|s/player|'
         r'storefront|oops|index|account|reporthistory|t/terms|about|upload|signin|logout')
 
+    _PLAYLIST_ID_RE = r'(?:(?:PL|LL|EC|UU|FL|RD|UL|TL|PU|OLAK5uy_)[0-9A-Za-z-_]{10,}|RDMM|WL|LL|LM)'
+
     _NETRC_MACHINE = 'youtube'
+
     # 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,}|RDMM|WL|LL|LM)'
+    r'''  # Unused since login is broken
+    _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
+    _TWOFACTOR_URL = 'https://accounts.google.com/signin/challenge'
+
+    _LOOKUP_URL = 'https://accounts.google.com/_/signin/sl/lookup'
+    _CHALLENGE_URL = 'https://accounts.google.com/_/signin/sl/challenge'
+    _TFA_URL = 'https://accounts.google.com/_/signin/challenge?hl=en&TL={0}'
+    '''
 
     def _login(self):
         """
@@ -312,175 +483,21 @@ def _real_initialize(self):
     _YT_INITIAL_PLAYER_RESPONSE_RE = r'ytInitialPlayerResponse\s*=\s*({.+?})\s*;'
     _YT_INITIAL_BOUNDARY_RE = r'(?:var\s+meta|</script|\n)'
 
-    _YT_DEFAULT_YTCFGS = {
-        'WEB': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'WEB',
-            'INNERTUBE_CLIENT_VERSION': '2.20210622.10.00',
-            'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'WEB',
-                    'clientVersion': '2.20210622.10.00',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 1
-        },
-        'WEB_REMIX': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'WEB_REMIX',
-            'INNERTUBE_CLIENT_VERSION': '1.20210621.00.00',
-            'INNERTUBE_API_KEY': 'AIzaSyC9XL3ZjWddXya6X74dJoCTL-WEYFDNX30',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'WEB_REMIX',
-                    'clientVersion': '1.20210621.00.00',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 67
-        },
-        'WEB_EMBEDDED_PLAYER': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'WEB_EMBEDDED_PLAYER',
-            'INNERTUBE_CLIENT_VERSION': '1.20210620.0.1',
-            'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'WEB_EMBEDDED_PLAYER',
-                    'clientVersion': '1.20210620.0.1',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 56
-        },
-        'ANDROID': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'ANDROID',
-            'INNERTUBE_CLIENT_VERSION': '16.20',
-            'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'ANDROID',
-                    'clientVersion': '16.20',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 3
-        },
-        'ANDROID_EMBEDDED_PLAYER': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'ANDROID_EMBEDDED_PLAYER',
-            'INNERTUBE_CLIENT_VERSION': '16.20',
-            'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'ANDROID_EMBEDDED_PLAYER',
-                    'clientVersion': '16.20',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 55
-        },
-        'ANDROID_MUSIC': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'ANDROID_MUSIC',
-            'INNERTUBE_CLIENT_VERSION': '4.32',
-            'INNERTUBE_API_KEY': 'AIzaSyC9XL3ZjWddXya6X74dJoCTL-WEYFDNX30',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'ANDROID_MUSIC',
-                    'clientVersion': '4.32',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 21
-        },
-        'IOS': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'IOS',
-            'INNERTUBE_CLIENT_VERSION': '16.20',
-            'INNERTUBE_API_KEY': 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'IOS',
-                    'clientVersion': '16.20',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 5
-
-        },
-        'IOS_MUSIC': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'IOS_MUSIC',
-            'INNERTUBE_CLIENT_VERSION': '4.32',
-            'INNERTUBE_API_KEY': 'AIzaSyDK3iBpDP9nHVTk2qL73FLJICfOC3c51Og',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'IOS_MUSIC',
-                    'clientVersion': '4.32',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 26
-        },
-        'IOS_MESSAGES_EXTENSION': {
-            'INNERTUBE_API_VERSION': 'v1',
-            'INNERTUBE_CLIENT_NAME': 'IOS_MESSAGES_EXTENSION',
-            'INNERTUBE_CLIENT_VERSION': '16.20',
-            'INNERTUBE_API_KEY': 'AIzaSyDCU8hByM-4DrUqRUYnGn-3llEO78bcxq8',
-            'INNERTUBE_CONTEXT': {
-                'client': {
-                    'clientName': 'IOS_MESSAGES_EXTENSION',
-                    'clientVersion': '16.20',
-                    'hl': 'en',
-                }
-            },
-            'INNERTUBE_CONTEXT_CLIENT_NAME': 66
-        }
-    }
-
-    _YT_DEFAULT_INNERTUBE_HOSTS = {
-        'DIRECT': 'youtubei.googleapis.com',
-        'WEB': 'www.youtube.com',
-        'WEB_REMIX': 'music.youtube.com',
-        'ANDROID_MUSIC': 'music.youtube.com'
-    }
+    def _get_default_ytcfg(self, client='web'):
+        return copy.deepcopy(INNERTUBE_CLIENTS[client])
 
-    # clients starting with _ cannot be explicity requested by the user
-    _YT_CLIENTS = {
-        'android': 'ANDROID',
-        'android_music': 'ANDROID_MUSIC',
-        '_android_embedded': 'ANDROID_EMBEDDED_PLAYER',
-        '_android_agegate': 'ANDROID',
-        'ios': 'IOS',
-        'ios_music': 'IOS_MUSIC',
-        '_ios_embedded': 'IOS_MESSAGES_EXTENSION',
-        '_ios_agegate': 'IOS',
-        'web': 'WEB',
-        'web_music': 'WEB_REMIX',
-        '_web_embedded': 'WEB_EMBEDDED_PLAYER',
-        '_web_agegate': 'TVHTML5',
-    }
+    def _get_innertube_host(self, client='web'):
+        return INNERTUBE_CLIENTS[client]['INNERTUBE_HOST']
 
-    def _get_default_ytcfg(self, client='WEB'):
-        if client in self._YT_DEFAULT_YTCFGS:
-            return copy.deepcopy(self._YT_DEFAULT_YTCFGS[client])
-        self.write_debug(f'INNERTUBE default client {client} does not exist - falling back to WEB client.')
-        return copy.deepcopy(self._YT_DEFAULT_YTCFGS['WEB'])
-
-    def _get_innertube_host(self, client='WEB'):
-        return dict_get(self._YT_DEFAULT_INNERTUBE_HOSTS, (client, 'WEB'))
-
-    def _ytcfg_get_safe(self, ytcfg, getter, expected_type=None, default_client='WEB'):
+    def _ytcfg_get_safe(self, ytcfg, getter, expected_type=None, default_client='web'):
         # try_get but with fallback to default ytcfg client values when present
         _func = lambda y: try_get(y, getter, expected_type)
         return _func(ytcfg) or _func(self._get_default_ytcfg(default_client))
 
-    def _extract_client_name(self, ytcfg, default_client='WEB'):
-        return self._ytcfg_get_safe(ytcfg, lambda x: x['INNERTUBE_CLIENT_NAME'], compat_str, default_client)
+    def _extract_client_name(self, ytcfg, default_client='web'):
+        return self._ytcfg_get_safe(
+            ytcfg, (lambda x: x['INNERTUBE_CLIENT_NAME'],
+                    lambda x: x['INNERTUBE_CONTEXT']['client']['clientName']), compat_str, default_client)
 
     @staticmethod
     def _extract_session_index(*data):
@@ -489,13 +506,15 @@ def _extract_session_index(*data):
             if session_index is not None:
                 return session_index
 
-    def _extract_client_version(self, ytcfg, default_client='WEB'):
-        return self._ytcfg_get_safe(ytcfg, lambda x: x['INNERTUBE_CLIENT_VERSION'], compat_str, default_client)
+    def _extract_client_version(self, ytcfg, default_client='web'):
+        return self._ytcfg_get_safe(
+            ytcfg, (lambda x: x['INNERTUBE_CLIENT_VERSION'],
+                    lambda x: x['INNERTUBE_CONTEXT']['client']['clientVersion']), compat_str, default_client)
 
-    def _extract_api_key(self, ytcfg=None, default_client='WEB'):
+    def _extract_api_key(self, ytcfg=None, default_client='web'):
         return self._ytcfg_get_safe(ytcfg, lambda x: x['INNERTUBE_API_KEY'], compat_str, default_client)
 
-    def _extract_context(self, ytcfg=None, default_client='WEB'):
+    def _extract_context(self, ytcfg=None, default_client='web'):
         _get_context = lambda y: try_get(y, lambda x: x['INNERTUBE_CONTEXT'], dict)
         context = _get_context(ytcfg)
         if context:
@@ -515,29 +534,36 @@ def _extract_context(self, ytcfg=None, default_client='WEB'):
             context['client']['visitorData'] = visitor_data
         return context
 
+    _SAPISID = None
+
     def _generate_sapisidhash_header(self, origin='https://www.youtube.com'):
-        # Sometimes SAPISID cookie isn't present but __Secure-3PAPISID is.
-        # See: https://github.com/yt-dlp/yt-dlp/issues/393
-        yt_cookies = self._get_cookies('https://www.youtube.com')
-        sapisid_cookie = dict_get(
-            yt_cookies, ('__Secure-3PAPISID', 'SAPISID'))
-        if sapisid_cookie is None or not sapisid_cookie.value:
-            return
         time_now = round(time.time())
-        # SAPISID cookie is required if not already present
-        if not yt_cookies.get('SAPISID'):
-            self.write_debug('Copying __Secure-3PAPISID cookie to SAPISID cookie', only_once=True)
-            self._set_cookie(
-                '.youtube.com', 'SAPISID', sapisid_cookie.value, secure=True, expire_time=time_now + 3600)
-        self.write_debug('Extracted SAPISID cookie', only_once=True)
+        if self._SAPISID is None:
+            yt_cookies = self._get_cookies('https://www.youtube.com')
+            # Sometimes SAPISID cookie isn't present but __Secure-3PAPISID is.
+            # See: https://github.com/yt-dlp/yt-dlp/issues/393
+            sapisid_cookie = dict_get(
+                yt_cookies, ('__Secure-3PAPISID', 'SAPISID'))
+            if sapisid_cookie and sapisid_cookie.value:
+                self._SAPISID = sapisid_cookie.value
+                self.write_debug('Extracted SAPISID cookie')
+                # SAPISID cookie is required if not already present
+                if not yt_cookies.get('SAPISID'):
+                    self.write_debug('Copying __Secure-3PAPISID cookie to SAPISID cookie')
+                    self._set_cookie(
+                        '.youtube.com', 'SAPISID', self._SAPISID, secure=True, expire_time=time_now + 3600)
+            else:
+                self._SAPISID = False
+        if not self._SAPISID:
+            return None
         # SAPISIDHASH algorithm from https://stackoverflow.com/a/32065323
         sapisidhash = hashlib.sha1(
-            f'{time_now} {sapisid_cookie.value} {origin}'.encode('utf-8')).hexdigest()
+            f'{time_now} {self._SAPISID} {origin}'.encode('utf-8')).hexdigest()
         return f'SAPISIDHASH {time_now}_{sapisidhash}'
 
     def _call_api(self, ep, query, video_id, fatal=True, headers=None,
                   note='Downloading API JSON', errnote='Unable to download API page',
-                  context=None, api_key=None, api_hostname=None, default_client='WEB'):
+                  context=None, api_key=None, api_hostname=None, default_client='web'):
 
         data = {'context': context} if context else {'context': self._extract_context(default_client=default_client)}
         data.update(query)
@@ -599,7 +625,7 @@ def extract_ytcfg(self, video_id, webpage):
 
     def generate_api_headers(
             self, ytcfg=None, identity_token=None, account_syncid=None,
-            visitor_data=None, api_hostname=None, default_client='WEB', session_index=None):
+            visitor_data=None, api_hostname=None, default_client='web', session_index=None):
         origin = 'https://' + (api_hostname if api_hostname else self._get_innertube_host(default_client))
         headers = {
             'X-YouTube-Client-Name': compat_str(
@@ -695,17 +721,17 @@ def _extract_alerts(cls, data):
                 if message:
                     yield alert_type, message
 
-    def _report_alerts(self, alerts, expected=True):
+    def _report_alerts(self, alerts, expected=True, fatal=True, only_once=False):
         errors = []
         warnings = []
         for alert_type, alert_message in alerts:
-            if alert_type.lower() == 'error':
+            if alert_type.lower() == 'error' and fatal:
                 errors.append([alert_type, alert_message])
             else:
                 warnings.append([alert_type, alert_message])
 
         for alert_type, alert_message in (warnings + errors[:-1]):
-            self.report_warning('YouTube said: %s - %s' % (alert_type, alert_message))
+            self.report_warning('YouTube said: %s - %s' % (alert_type, alert_message), only_once=only_once)
         if errors:
             raise ExtractorError('YouTube said: %s' % errors[-1][1], expected=expected)
 
@@ -744,7 +770,7 @@ def _get_text(data, *path_list, max_runs=None):
 
     def _extract_response(self, item_id, query, note='Downloading API JSON', headers=None,
                           ytcfg=None, check_get_keys=None, ep='browse', fatal=True, api_hostname=None,
-                          default_client='WEB'):
+                          default_client='web'):
         response = None
         last_error = None
         count = -1
@@ -754,7 +780,7 @@ def _extract_response(self, item_id, query, note='Downloading API JSON', headers
         while count < retries:
             count += 1
             if last_error:
-                self.report_warning('%s. Retrying ...' % last_error)
+                self.report_warning('%s. Retrying ...' % remove_end(last_error, '.'))
             try:
                 response = self._call_api(
                     ep=ep, fatal=True, headers=headers,
@@ -765,12 +791,19 @@ def _extract_response(self, item_id, query, note='Downloading API JSON', headers
                     note='%s%s' % (note, ' (retry #%d)' % count if count else ''))
             except ExtractorError as e:
                 if isinstance(e.cause, network_exceptions):
+                    if isinstance(e.cause, compat_HTTPError) and not is_html(e.cause.read(512)):
+                        e.cause.seek(0)
+                        yt_error = try_get(
+                            self._parse_json(e.cause.read().decode(), item_id, fatal=False),
+                            lambda x: x['error']['message'], compat_str)
+                        if yt_error:
+                            self._report_alerts([('ERROR', yt_error)], fatal=False)
                     # Downloading page may result in intermittent 5xx HTTP error
                     # Sometimes a 404 is also recieved. See: https://github.com/ytdl-org/youtube-dl/issues/28289
                     # We also want to catch all other network exceptions since errors in later pages can be troublesome
                     # See https://github.com/yt-dlp/yt-dlp/issues/507#issuecomment-880188210
                     if not isinstance(e.cause, compat_HTTPError) or e.cause.code not in (403, 429):
-                        last_error = error_to_compat_str(e.cause or e)
+                        last_error = error_to_compat_str(e.cause or e.msg)
                         if count < retries:
                             continue
                 if fatal:
@@ -782,8 +815,13 @@ def _extract_response(self, item_id, query, note='Downloading API JSON', headers
             else:
                 # Youtube may send alerts if there was an issue with the continuation page
                 try:
-                    self._extract_and_report_alerts(response, expected=False)
+                    self._extract_and_report_alerts(response, expected=False, only_once=True)
                 except ExtractorError as e:
+                    # YouTube servers may return errors we want to retry on in a 200 OK response
+                    # See: https://github.com/yt-dlp/yt-dlp/issues/839
+                    if 'unknown error' in e.msg.lower():
+                        last_error = e.msg
+                        continue
                     if fatal:
                         raise
                     self.report_warning(error_to_compat_str(e))
@@ -909,7 +947,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                             youtube\.googleapis\.com)/                        # the various hostnames, with wildcard subdomains
                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
                          (?:                                                  # the various things that can precede the ID:
-                             (?:(?:v|embed|e)/(?!videoseries))                # v/ or embed/ or e/
+                             (?:(?:v|embed|e|shorts)/(?!videoseries))         # v/ or embed/ or e/ or shorts/
                              |(?:                                             # or the v= param in all its forms
                                  (?:(?:watch|movie)(?:_popup)?(?:\.php)?/?)?  # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
@@ -1036,18 +1074,17 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         '_rtmp': {'protocol': 'rtmp'},
 
         # av01 video only formats sometimes served with "unknown" codecs
-        '394': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '395': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '396': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '397': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
+        '394': {'ext': 'mp4', 'height': 144, 'format_note': 'DASH video', 'vcodec': 'av01.0.00M.08'},
+        '395': {'ext': 'mp4', 'height': 240, 'format_note': 'DASH video', 'vcodec': 'av01.0.00M.08'},
+        '396': {'ext': 'mp4', 'height': 360, 'format_note': 'DASH video', 'vcodec': 'av01.0.01M.08'},
+        '397': {'ext': 'mp4', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'av01.0.04M.08'},
+        '398': {'ext': 'mp4', 'height': 720, 'format_note': 'DASH video', 'vcodec': 'av01.0.05M.08'},
+        '399': {'ext': 'mp4', 'height': 1080, 'format_note': 'DASH video', 'vcodec': 'av01.0.08M.08'},
+        '400': {'ext': 'mp4', 'height': 1440, 'format_note': 'DASH video', 'vcodec': 'av01.0.12M.08'},
+        '401': {'ext': 'mp4', 'height': 2160, 'format_note': 'DASH video', 'vcodec': 'av01.0.12M.08'},
     }
     _SUBTITLE_FORMATS = ('json3', 'srv1', 'srv2', 'srv3', 'ttml', 'vtt')
 
-    _AGE_GATE_REASONS = (
-        'Sign in to confirm your age',
-        'This video may be inappropriate for some users.',
-        'Sorry, this content is age-restricted.')
-
     _GEO_BYPASS = False
 
     IE_NAME = 'youtube'
@@ -1152,8 +1189,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'format': '141/bestaudio[ext=m4a]',
             },
         },
-        # Normal age-gate video (embed allowed)
+        # Age-gate videos. See https://github.com/yt-dlp/yt-dlp/pull/575#issuecomment-888837000
         {
+            'note': 'Embed allowed age-gate video',
             'url': 'https://youtube.com/watch?v=HtVdAasjOgU',
             'info_dict': {
                 'id': 'HtVdAasjOgU',
@@ -1168,6 +1206,52 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'age_limit': 18,
             },
         },
+        {
+            'note': 'Age-gate video with embed allowed in public site',
+            'url': 'https://youtube.com/watch?v=HsUATh_Nc2U',
+            'info_dict': {
+                'id': 'HsUATh_Nc2U',
+                'ext': 'mp4',
+                'title': 'Godzilla 2 (Official Video)',
+                'description': 'md5:bf77e03fcae5529475e500129b05668a',
+                'upload_date': '20200408',
+                'uploader_id': 'FlyingKitty900',
+                'uploader': 'FlyingKitty',
+                'age_limit': 18,
+            },
+        },
+        {
+            'note': 'Age-gate video embedable only with clientScreen=EMBED',
+            'url': 'https://youtube.com/watch?v=Tq92D6wQ1mg',
+            'info_dict': {
+                'id': 'Tq92D6wQ1mg',
+                'title': '[MMD] Adios - EVERGLOW [+Motion DL]',
+                'ext': 'mp4',
+                'upload_date': '20191227',
+                'uploader_id': 'UC1yoRdFoFJaCY-AGfD9W0wQ',
+                'uploader': 'Projekt Melody',
+                'description': 'md5:17eccca93a786d51bc67646756894066',
+                'age_limit': 18,
+            },
+        },
+        {
+            'note': 'Non-Agegated non-embeddable video',
+            'url': 'https://youtube.com/watch?v=MeJVWBSsPAY',
+            'info_dict': {
+                'id': 'MeJVWBSsPAY',
+                'ext': 'mp4',
+                'title': 'OOMPH! - Such Mich Find Mich (Lyrics)',
+                'uploader': 'Herr Lurik',
+                'uploader_id': 'st3in234',
+                'description': 'Fan Video. Music & Lyrics by OOMPH!.',
+                'upload_date': '20130730',
+            },
+        },
+        {
+            'note': 'Non-bypassable age-gated video',
+            'url': 'https://youtube.com/watch?v=Cr381pDsSsA',
+            'only_matching': True,
+        },
         # video_info is None (https://github.com/ytdl-org/youtube-dl/issues/4421)
         # YouTube Red ad is not captured for creator
         {
@@ -1336,6 +1420,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             'params': {
                 'skip_download': True,
             },
+            'skip': 'Not multifeed anymore',
         },
         {
             # Multifeed video with comma in title (see https://github.com/ytdl-org/youtube-dl/issues/8536)
@@ -1752,14 +1837,17 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             'params': {
                 'extractor_args': {'youtube': {'player_skip': ['configs']}},
             },
-        }
+        }, {
+            # shorts
+            'url': 'https://www.youtube.com/shorts/BGQWPY4IigY',
+            'only_matching': True,
+        },
     ]
 
     @classmethod
     def suitable(cls, url):
-        # Hack for lazy extractors until more generic solution is implemented
-        # (see #28780)
-        from .youtube import parse_qs
+        from ..utils import parse_qs
+
         qs = parse_qs(url)
         if qs.get('list', [None])[0]:
             return False
@@ -1874,10 +1962,10 @@ def _parse_sig_js(self, jscode):
         funcname = self._search_regex(
             (r'\b[cs]\s*&&\s*[adf]\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\(',
              r'\b[a-zA-Z0-9]+\s*&&\s*[a-zA-Z0-9]+\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\(',
-             r'\bm=(?P<sig>[a-zA-Z0-9$]{2})\(decodeURIComponent\(h\.s\)\)',
-             r'\bc&&\(c=(?P<sig>[a-zA-Z0-9$]{2})\(decodeURIComponent\(c\)\)',
-             r'(?:\b|[^a-zA-Z0-9$])(?P<sig>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\);[a-zA-Z0-9$]{2}\.[a-zA-Z0-9$]{2}\(a,\d+\)',
-             r'(?:\b|[^a-zA-Z0-9$])(?P<sig>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
+             r'\bm=(?P<sig>[a-zA-Z0-9$]{2,})\(decodeURIComponent\(h\.s\)\)',
+             r'\bc&&\(c=(?P<sig>[a-zA-Z0-9$]{2,})\(decodeURIComponent\(c\)\)',
+             r'(?:\b|[^a-zA-Z0-9$])(?P<sig>[a-zA-Z0-9$]{2,})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\);[a-zA-Z0-9$]{2}\.[a-zA-Z0-9$]{2}\(a,\d+\)',
+             r'(?:\b|[^a-zA-Z0-9$])(?P<sig>[a-zA-Z0-9$]{2,})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
              r'(?P<sig>[a-zA-Z0-9$]+)\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
              # Obsolete patterns
              r'(["\'])signature\1\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',
@@ -2009,8 +2097,7 @@ def extract_id(cls, url):
         mobj = re.match(cls._VALID_URL, url, re.VERBOSE)
         if mobj is None:
             raise ExtractorError('Invalid URL: %s' % url)
-        video_id = mobj.group(2)
-        return video_id
+        return mobj.group('id')
 
     def _extract_chapters_from_json(self, data, duration):
         chapter_list = traverse_obj(
@@ -2319,7 +2406,11 @@ def _real_comment_extract(contents):
         known_entry_comment_renderers = ('itemSectionRenderer',)
         estimated_total = 0
         max_comments = int_or_none(self._configuration_arg('max_comments', [''])[0]) or float('inf')
-
+        # Force English regardless of account setting to prevent parsing issues
+        # See: https://github.com/yt-dlp/yt-dlp/issues/532
+        ytcfg = copy.deepcopy(ytcfg)
+        traverse_obj(
+            ytcfg, ('INNERTUBE_CONTEXT', 'client'), expected_type=dict, default={})['hl'] = 'en'
         try:
             for comment in _real_comment_extract(contents):
                 if len(comments) >= max_comments:
@@ -2352,28 +2443,20 @@ def _generate_player_context(sts=None):
         }
 
     @staticmethod
-    def _get_video_info_params(video_id, client='TVHTML5'):
-        GVI_CLIENTS = {
-            'ANDROID': {
-                'c': 'ANDROID',
-                'cver': '16.20',
-            },
-            'TVHTML5': {
-                'c': 'TVHTML5',
-                'cver': '6.20180913',
-            },
-            'IOS': {
-                'c': 'IOS',
-                'cver': '16.20'
-            }
-        }
-        query = {
-            'video_id': video_id,
-            'eurl': 'https://youtube.googleapis.com/v/' + video_id,
-            'html5': '1'
-        }
-        query.update(GVI_CLIENTS.get(client))
-        return query
+    def _is_agegated(player_response):
+        if traverse_obj(player_response, ('playabilityStatus', 'desktopLegacyAgeGateReason')):
+            return True
+
+        reasons = traverse_obj(player_response, ('playabilityStatus', ('status', 'reason')), default=[])
+        AGE_GATE_REASONS = (
+            'confirm your age', 'age-restricted', 'inappropriate',  # reason
+            'age_verification_required', 'age_check_required',  # status
+        )
+        return any(expected in reason for expected in AGE_GATE_REASONS for reason in reasons)
+
+    @staticmethod
+    def _is_unplayable(player_response):
+        return traverse_obj(player_response, ('playabilityStatus', 'status')) == 'UNPLAYABLE'
 
     def _extract_player_response(self, client, video_id, master_ytcfg, player_ytcfg, identity_token, player_url, initial_pr):
 
@@ -2382,56 +2465,22 @@ def _extract_player_response(self, client, video_id, master_ytcfg, player_ytcfg,
         sts = self._extract_signature_timestamp(video_id, player_url, master_ytcfg, fatal=False)
         headers = self.generate_api_headers(
             player_ytcfg, identity_token, syncid,
-            default_client=self._YT_CLIENTS[client], session_index=session_index)
+            default_client=client, session_index=session_index)
 
         yt_query = {'videoId': video_id}
         yt_query.update(self._generate_player_context(sts))
         return self._extract_response(
             item_id=video_id, ep='player', query=yt_query,
-            ytcfg=player_ytcfg, headers=headers, fatal=False,
-            default_client=self._YT_CLIENTS[client],
+            ytcfg=player_ytcfg, headers=headers, fatal=True,
+            default_client=client,
             note='Downloading %s player API JSON' % client.replace('_', ' ').strip()
         ) or None
 
-    def _extract_age_gated_player_response(self, client, video_id, ytcfg, identity_token, player_url, initial_pr):
-        # get_video_info endpoint seems to be completely dead
-        gvi_client = None  # self._YT_CLIENTS.get(f'_{client}_agegate')
-        if gvi_client:
-            pr = self._parse_json(traverse_obj(
-                compat_parse_qs(self._download_webpage(
-                    self.http_scheme() + '//www.youtube.com/get_video_info', video_id,
-                    'Refetching age-gated %s info webpage' % gvi_client.lower(),
-                    'unable to download video info webpage', fatal=False,
-                    query=self._get_video_info_params(video_id, client=gvi_client))),
-                ('player_response', 0), expected_type=str) or '{}', video_id)
-            if pr:
-                return pr
-            self.report_warning('Falling back to embedded-only age-gate workaround')
-
-        if not self._YT_CLIENTS.get(f'_{client}_embedded'):
-            return
-        embed_webpage = None
-        if client == 'web' and 'configs' not in self._configuration_arg('player_skip'):
-            embed_webpage = self._download_webpage(
-                'https://www.youtube.com/embed/%s?html5=1' % video_id,
-                video_id=video_id, note=f'Downloading age-gated {client} embed config')
-
-        ytcfg_age = self.extract_ytcfg(video_id, embed_webpage) or {}
-        # If we extracted the embed webpage, it'll tell us if we can view the video
-        embedded_pr = self._parse_json(
-            traverse_obj(ytcfg_age, ('PLAYER_VARS', 'embedded_player_response'), expected_type=str) or '{}',
-            video_id=video_id)
-        embedded_ps_reason = traverse_obj(embedded_pr, ('playabilityStatus', 'reason'), expected_type=str) or ''
-        if embedded_ps_reason in self._AGE_GATE_REASONS:
-            return
-        return self._extract_player_response(
-            f'_{client}_embedded', video_id,
-            ytcfg_age or ytcfg, ytcfg_age if client == 'web' else {},
-            identity_token, player_url, initial_pr)
-
     def _get_requested_clients(self, url, smuggled_data):
         requested_clients = []
-        allowed_clients = [client for client in self._YT_CLIENTS.keys() if client[:1] != '_']
+        allowed_clients = sorted(
+            [client for client in INNERTUBE_CLIENTS.keys() if client[:1] != '_'],
+            key=lambda client: INNERTUBE_CLIENTS[client]['priority'], reverse=True)
         for client in self._configuration_arg('player_client'):
             if client in allowed_clients:
                 requested_clients.append(client)
@@ -2444,10 +2493,20 @@ def _get_requested_clients(self, url, smuggled_data):
 
         if smuggled_data.get('is_music_url') or self.is_music_url(url):
             requested_clients.extend(
-                f'{client}_music' for client in requested_clients if not client.endswith('_music'))
+                f'{client}_music' for client in requested_clients if f'{client}_music' in INNERTUBE_CLIENTS)
 
         return orderedSet(requested_clients)
 
+    def _extract_player_ytcfg(self, client, video_id):
+        url = {
+            'web_music': 'https://music.youtube.com',
+            'web_embedded': f'https://www.youtube.com/embed/{video_id}?html5=1'
+        }.get(client)
+        if not url:
+            return {}
+        webpage = self._download_webpage(url, video_id, fatal=False, note=f'Downloading {client} config')
+        return self.extract_ytcfg(video_id, webpage) or {}
+
     def _extract_player_responses(self, clients, video_id, webpage, master_ytcfg, player_url, identity_token):
         initial_pr = None
         if webpage:
@@ -2455,40 +2514,63 @@ def _extract_player_responses(self, clients, video_id, webpage, master_ytcfg, pl
                 webpage, self._YT_INITIAL_PLAYER_RESPONSE_RE,
                 video_id, 'initial player response')
 
-        for client in clients:
-            player_ytcfg = master_ytcfg if client == 'web' else {}
-            if client == 'web' and initial_pr:
-                pr = initial_pr
-            else:
-                if client == 'web_music' and 'configs' not in self._configuration_arg('player_skip'):
-                    ytm_webpage = self._download_webpage(
-                        'https://music.youtube.com',
-                        video_id, fatal=False, note='Downloading remix client config')
-                    player_ytcfg = self.extract_ytcfg(video_id, ytm_webpage) or {}
-                pr = self._extract_player_response(
-                    client, video_id, player_ytcfg or master_ytcfg, player_ytcfg, identity_token, player_url, initial_pr)
-            if pr:
-                yield pr
-            if traverse_obj(pr, ('playabilityStatus', 'reason')) in self._AGE_GATE_REASONS:
-                pr = self._extract_age_gated_player_response(
-                    client, video_id, player_ytcfg or master_ytcfg, identity_token, player_url, initial_pr)
-                if pr:
-                    yield pr
+        original_clients = clients
+        clients = clients[::-1]
+
+        def append_client(client_name):
+            if client_name in INNERTUBE_CLIENTS and client_name not in original_clients:
+                clients.append(client_name)
+
         # Android player_response does not have microFormats which are needed for
         # extraction of some data. So we return the initial_pr with formats
         # stripped out even if not requested by the user
         # See: https://github.com/yt-dlp/yt-dlp/issues/501
-        if initial_pr and 'web' not in clients:
-            initial_pr['streamingData'] = None
-            yield initial_pr
+        yielded_pr = False
+        if initial_pr:
+            pr = dict(initial_pr)
+            pr['streamingData'] = None
+            yielded_pr = True
+            yield pr
+
+        last_error = None
+        while clients:
+            client = clients.pop()
+            player_ytcfg = master_ytcfg if client == 'web' else {}
+            if 'configs' not in self._configuration_arg('player_skip'):
+                player_ytcfg = self._extract_player_ytcfg(client, video_id) or player_ytcfg
+
+            try:
+                pr = initial_pr if client == 'web' and initial_pr else self._extract_player_response(
+                    client, video_id, player_ytcfg or master_ytcfg, player_ytcfg, identity_token, player_url, initial_pr)
+            except ExtractorError as e:
+                if last_error:
+                    self.report_warning(last_error)
+                last_error = e
+                continue
+
+            if pr:
+                yielded_pr = True
+                yield pr
+
+            # creator clients can bypass AGE_VERIFICATION_REQUIRED if logged in
+            if client.endswith('_agegate') and self._is_unplayable(pr) and self._generate_sapisidhash_header():
+                append_client(client.replace('_agegate', '_creator'))
+            elif self._is_agegated(pr):
+                append_client(f'{client}_agegate')
+
+        if last_error:
+            if not yielded_pr:
+                raise last_error
+            self.report_warning(last_error)
 
     def _extract_formats(self, streaming_data, video_id, player_url, is_live):
         itags, stream_ids = [], []
-        itag_qualities = {}
+        itag_qualities, res_qualities = {}, {}
         q = qualities([
-            # "tiny" is the smallest video-only format. But some audio-only formats
-            # was also labeled "tiny". It is not clear if such formats still exist
-            'tiny', 'audio_quality_low', 'audio_quality_medium', 'audio_quality_high',  # Audio only formats
+            # Normally tiny is the smallest video-only formats. But
+            # audio-only formats with unknown quality may get tagged as tiny
+            'tiny',
+            'audio_quality_ultralow', 'audio_quality_low', 'audio_quality_medium', 'audio_quality_high',  # Audio only formats
             'small', 'medium', 'large', 'hd720', 'hd1080', 'hd1440', 'hd2160', 'hd2880', 'highres'
         ])
         streaming_formats = traverse_obj(streaming_data, (..., ('formats', 'adaptiveFormats'), ...), default=[])
@@ -2504,10 +2586,18 @@ def _extract_formats(self, streaming_data, video_id, player_url, is_live):
                 continue
 
             quality = fmt.get('quality')
+            height = int_or_none(fmt.get('height'))
             if quality == 'tiny' or not quality:
                 quality = fmt.get('audioQuality', '').lower() or quality
-            if itag and quality:
-                itag_qualities[itag] = quality
+            # The 3gp format (17) in android client has a quality of "small",
+            # but is actually worse than other formats
+            if itag == '17':
+                quality = 'tiny'
+            if quality:
+                if itag:
+                    itag_qualities[itag] = quality
+                if height:
+                    res_qualities[height] = quality
             # FORMAT_STREAM_TYPE_OTF(otf=1) requires downloading the init fragment
             # (adding `&sq=0` to the URL) and parsing emsg box to determine the
             # number of fragment that would subsequently requested with (`&sq=N`)
@@ -2538,25 +2628,23 @@ def _extract_formats(self, streaming_data, video_id, player_url, is_live):
                 'filesize': int_or_none(fmt.get('contentLength')),
                 'format_id': itag,
                 'format_note': ', '.join(filter(None, (
-                    audio_track.get('displayName'), fmt.get('qualityLabel') or quality))),
+                    '%s%s' % (audio_track.get('displayName') or '',
+                              ' (default)' if audio_track.get('audioIsDefault') else ''),
+                    fmt.get('qualityLabel') or quality.replace('audio_quality_', '')))),
                 'fps': int_or_none(fmt.get('fps')),
-                'height': int_or_none(fmt.get('height')),
+                'height': height,
                 'quality': q(quality),
                 'tbr': tbr,
                 'url': fmt_url,
-                'width': fmt.get('width'),
+                'width': int_or_none(fmt.get('width')),
                 'language': audio_track.get('id', '').split('.')[0],
+                'language_preference': 1 if audio_track.get('audioIsDefault') else -1,
             }
             mime_mobj = re.match(
                 r'((?:[^/]+)/(?:[^;]+))(?:;\s*codecs="([^"]+)")?', fmt.get('mimeType') or '')
             if mime_mobj:
                 dct['ext'] = mimetype2ext(mime_mobj.group(1))
                 dct.update(parse_codecs(mime_mobj.group(2)))
-                # The 3gp format in android client has a quality of "small",
-                # but is actually worse than all other formats
-                if dct['ext'] == '3gp':
-                    dct['quality'] = q('tiny')
-                    dct['preference'] = -10
             no_audio = dct.get('acodec') == 'none'
             no_video = dct.get('vcodec') == 'none'
             if no_audio:
@@ -2573,14 +2661,21 @@ def _extract_formats(self, streaming_data, video_id, player_url, is_live):
             yield dct
 
         skip_manifests = self._configuration_arg('skip')
-        get_dash = not is_live and 'dash' not in skip_manifests and self.get_param('youtube_include_dash_manifest', True)
+        get_dash = (
+            (not is_live or self._configuration_arg('include_live_dash'))
+            and 'dash' not in skip_manifests and self.get_param('youtube_include_dash_manifest', True))
         get_hls = 'hls' not in skip_manifests and self.get_param('youtube_include_hls_manifest', True)
 
+        def guess_quality(f):
+            for val, qdict in ((f.get('format_id'), itag_qualities), (f.get('height'), res_qualities)):
+                if val in qdict:
+                    return q(qdict[val])
+            return -1
+
         for sd in streaming_data:
             hls_manifest_url = get_hls and sd.get('hlsManifestUrl')
             if hls_manifest_url:
-                for f in self._extract_m3u8_formats(
-                        hls_manifest_url, video_id, 'mp4', fatal=False):
+                for f in self._extract_m3u8_formats(hls_manifest_url, video_id, 'mp4', fatal=False):
                     itag = self._search_regex(
                         r'/itag/(\d+)', f['url'], 'itag', default=None)
                     if itag in itags:
@@ -2588,19 +2683,18 @@ def _extract_formats(self, streaming_data, video_id, player_url, is_live):
                     if itag:
                         f['format_id'] = itag
                         itags.append(itag)
+                    f['quality'] = guess_quality(f)
                     yield f
 
             dash_manifest_url = get_dash and sd.get('dashManifestUrl')
             if dash_manifest_url:
-                for f in self._extract_mpd_formats(
-                        dash_manifest_url, video_id, fatal=False):
+                for f in self._extract_mpd_formats(dash_manifest_url, video_id, fatal=False):
                     itag = f['format_id']
                     if itag in itags:
                         continue
                     if itag:
                         itags.append(itag)
-                    if itag in itag_qualities:
-                        f['quality'] = q(itag_qualities[itag])
+                    f['quality'] = guess_quality(f)
                     filesize = int_or_none(self._search_regex(
                         r'/clen/(\d+)', f.get('fragment_base_url')
                         or f['url'], 'file size', default=None))
@@ -2706,8 +2800,7 @@ def feed_entry(name):
 
         if not formats:
             if not self.get_param('allow_unplayable_formats') and traverse_obj(streaming_data, (..., 'licenseInfos')):
-                self.raise_no_formats(
-                    'This video is DRM protected.', expected=True)
+                self.report_drm(video_id)
             pemr = get_first(
                 playability_statuses,
                 ('errorScreen', 'playerErrorMessageRenderer'), expected_type=dict) or {}
@@ -2725,13 +2818,14 @@ def feed_entry(name):
                 self.raise_no_formats(reason, expected=True)
 
         for f in formats:
-            # TODO: detect if throttled
-            if '&n=' in f['url']:  # possibly throttled
+            if '&c=WEB&' in f['url'] and '&ratebypass=yes&' not in f['url']:  # throttled
                 f['source_preference'] = -10
-                # note = f.get('format_note')
-                # f['format_note'] = f'{note} (throttled)' if note else '(throttled)'
+                # TODO: this method is not reliable
+                f['format_note'] = format_field(f, 'format_note', '%s ') + '(maybe throttled)'
 
-        self._sort_formats(formats)
+        # Source is given priority since formats that throttle are given lower source_preference
+        # When throttling issue is fully fixed, remove this
+        self._sort_formats(formats, ('quality', 'res', 'fps', 'source', 'codec:vp9.2', 'lang'))
 
         keywords = get_first(video_details, 'keywords', expected_type=list) or []
         if not keywords and webpage:
@@ -2889,7 +2983,7 @@ def process_language(container, base_url, lang_code, sub_name, query):
                         continue
                     process_language(
                         subtitles, base_url, lang_code,
-                        traverse_obj(caption_track, ('name', 'simpleText')),
+                        traverse_obj(caption_track, ('name', 'simpleText'), ('name', 'runs', ..., 'text'), get_all=False),
                         {})
                     continue
                 automatic_captions = {}
@@ -3081,40 +3175,7 @@ def process_language(container, base_url, lang_code, sub_name, query):
             needs_auth=info['age_limit'] >= 18,
             is_unlisted=None if is_private is None else is_unlisted)
 
-        # get xsrf for annotations or comments
-        get_annotations = self.get_param('writeannotations', False)
-        get_comments = self.get_param('getcomments', False)
-        if get_annotations or get_comments:
-            xsrf_token = None
-            if master_ytcfg:
-                xsrf_token = try_get(master_ytcfg, lambda x: x['XSRF_TOKEN'], compat_str)
-            if not xsrf_token:
-                xsrf_token = self._search_regex(
-                    r'([\'"])XSRF_TOKEN\1\s*:\s*([\'"])(?P<xsrf_token>(?:(?!\2).)+)\2',
-                    webpage, 'xsrf token', group='xsrf_token', fatal=False)
-
-        # annotations
-        if get_annotations:
-            invideo_url = get_first(
-                player_responses,
-                ('annotations', 0, 'playerAnnotationsUrlsRenderer', 'invideoUrl'),
-                expected_type=str)
-            if xsrf_token and invideo_url:
-                xsrf_field_name = None
-                if master_ytcfg:
-                    xsrf_field_name = try_get(master_ytcfg, lambda x: x['XSRF_FIELD_NAME'], compat_str)
-                if not xsrf_field_name:
-                    xsrf_field_name = self._search_regex(
-                        r'([\'"])XSRF_FIELD_NAME\1\s*:\s*([\'"])(?P<xsrf_field_name>\w+)\2',
-                        webpage, 'xsrf field name',
-                        group='xsrf_field_name', default='session_token')
-                info['annotations'] = self._download_webpage(
-                    self._proto_relative_url(invideo_url),
-                    video_id, note='Downloading annotations',
-                    errnote='Unable to download video annotations', fatal=False,
-                    data=urlencode_postdata({xsrf_field_name: xsrf_token}))
-
-        if get_comments:
+        if self.get_param('getcomments', False):
             info['__post_extractor'] = lambda: self._extract_comments(master_ytcfg, video_id, contents, webpage)
 
         self.mark_watched(video_id, player_responses)
@@ -3398,7 +3459,7 @@ class YoutubeTabIE(YoutubeBaseInfoExtractor):
     }, {
         'url': 'https://www.youtube.com/channel/UCoMdktPbSTixAyNGwb-UYkQ/live',
         'info_dict': {
-            'id': 'FMtPN8yp5LU',  # This will keep changing
+            'id': '3yImotZU3tw',  # This will keep changing
             'ext': 'mp4',
             'title': compat_str,
             'uploader': 'Sky News',
@@ -4230,7 +4291,7 @@ def get_mobj(url):
         # YouTube sometimes provides a button to reload playlist with unavailable videos.
         if 'no-youtube-unavailable-videos' not in compat_opts:
             data = self._reload_with_unavailable_videos(item_id, data, webpage) or data
-        self._extract_and_report_alerts(data)
+        self._extract_and_report_alerts(data, only_once=True)
         tabs = try_get(
             data, lambda x: x['contents']['twoColumnBrowseResultsRenderer']['tabs'], list)
         if tabs:
@@ -4367,7 +4428,7 @@ class YoutubeYtBeIE(InfoExtractor):
     }]
 
     def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
+        mobj = self._match_valid_url(url)
         video_id = mobj.group('id')
         playlist_id = mobj.group('playlist_id')
         return self.url_result(
@@ -4510,7 +4571,7 @@ def _make_valid_url(cls):
         return cls._VALID_URL
 
     def _real_extract(self, url):
-        qs = compat_parse_qs(compat_urllib_parse_urlparse(url).query)
+        qs = parse_qs(url)
         query = (qs.get('search_query') or qs.get('q'))[0]
         self._SEARCH_PARAMS = qs.get('sp', ('',))[0]
         return self._get_n_results(query, self._MAX_RESULTS)