+
+ automatic_captions, subtitles = {}, {}
+ subs_data = traverse_obj(post, (..., 'video', ..., 'attachments', ..., lambda k, v: (
+ k == 'media' and str(v['id']) == video_id and v['__typename'] == 'Video')))
+ is_video_broadcast = get_first(subs_data, 'is_video_broadcast', expected_type=bool)
+ captions = get_first(subs_data, 'video_available_captions_locales', 'captions_url')
+ if url_or_none(captions): # if subs_data only had a 'captions_url'
+ locale = self._html_search_meta(['og:locale', 'twitter:locale'], webpage, 'locale', default='en_US')
+ subtitles[locale] = [{'url': captions}]
+ # or else subs_data had 'video_available_captions_locales', a list of dicts
+ for caption in traverse_obj(captions, (
+ {lambda x: sorted(x, key=lambda c: c['locale'])}, lambda _, v: v['captions_url'])
+ ):
+ lang = caption.get('localized_language') or ''
+ subs = {
+ 'url': caption['captions_url'],
+ 'name': format_field(caption, 'localized_country', f'{lang} (%s)', default=lang),
+ }
+ if caption.get('localized_creation_method') or is_video_broadcast:
+ automatic_captions.setdefault(caption['locale'], []).append(subs)
+ else:
+ subtitles.setdefault(caption['locale'], []).append(subs)
+