Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/bilibili.py (Python)

Code before:
        page_list_json = not is_festival and traverse_obj(
            self._download_json(
                'https://api.bilibili.com/x/player/pagelist', video_id,
                fatal=False, query={'bvid': video_id, 'jsonp': 'jsonp'},
                note='Extracting videos in anthology', headers=headers),
            'data', expected_type=list) or []
        is_anthology = len(page_list_json) > 1

        part_id = int_or_none(parse_qs(url).get('p', [None])[-1])
        if is_anthology and not part_id and self._yes_playlist(video_id, video_id):
            return self.playlist_from_matches(
                page_list_json, video_id, title, ie=BiliBiliIE,
                getter=lambda entry: f'https://www.bilibili.com/video/{video_id}?p={entry["page"]}')

        if is_anthology:
            part_id = part_id or 1
            title += f' p{part_id:02d} {traverse_obj(page_list_json, (part_id - 1, "part")) or ""}'

        aid = video_data.get('aid')
        old_video_id = format_field(aid, None, f'%s_part{part_id or 1}')
        cid = traverse_obj(video_data, ('pages', part_id - 1, 'cid')) if part_id else video_data.get('cid')

        play_info = (
            traverse_obj(
                self._search_json(
                    r'window\.__playinfo__\s*=', webpage, 'play info', video_id, default=None),
                ('data', {dict}))
            or self._download_playinfo(video_id, cid, headers=headers))

        festival_info = {}
        if is_festival:
            festival_info = traverse_obj(initial_state, {
                'uploader': ('videoInfo', 'upName'),
                'uploader_id': ('videoInfo', 'upMid', {str_or_none}),
                'like_count': ('videoStatus', 'like', {int_or_none}),
                'thumbnail': ('sectionEpisodes', lambda _, v: v['bvid'] == video_id, 'cover'),
            }, get_all=False)

        metainfo = {
            **traverse_obj(initial_state, {
                'uploader': ('upData', 'name'),
                'uploader_id': ('upData', 'mid', {str_or_none}),
                'like_count': ('videoData', 'stat', 'like', {int_or_none}),
                'tags': ('tags', ..., 'tag_name'),
                'thumbnail': ('videoData', 'pic', {url_or_none}),
            }),
            **festival_info,
            **traverse_obj(video_data, {
                'description': 'desc',
                'timestamp': ('pubdate', {int_or_none}),
                'view_count': (('viewCount', ('stat', 'view')), {int_or_none}),

Review comment (suggestion):
line will be a little longer but it's more readable imo
```suggestion
               self._search_json(r'window\.__playinfo__\s*=', webpage, 'play info', video_id, default=None),
```

Code after:
        # Bilibili anthologies are similar to playlists but all videos share the same video ID as the anthology itself.
        page_list_json = not is_festival and traverse_obj(
            self._download_json(
                'https://api.bilibili.com/x/player/pagelist', video_id,
                fatal=False, query={'bvid': video_id, 'jsonp': 'jsonp'},
                note='Extracting videos in anthology', headers=headers),
            'data', expected_type=list) or []
        is_anthology = len(page_list_json) > 1

        part_id = int_or_none(parse_qs(url).get('p', [None])[-1])
        if is_anthology and not part_id and self._yes_playlist(video_id, video_id):
            return self.playlist_from_matches(
                page_list_json, video_id, title, ie=BiliBiliIE,
                getter=lambda entry: f'https://www.bilibili.com/video/{video_id}?p={entry["page"]}')

        if is_anthology:
            part_id = part_id or 1
            title += f' p{part_id:02d} {traverse_obj(page_list_json, (part_id - 1, "part")) or ""}'

        aid = video_data.get('aid')
        old_video_id = format_field(aid, None, f'%s_part{part_id or 1}')
        cid = traverse_obj(video_data, ('pages', part_id - 1, 'cid')) if part_id else video_data.get('cid')

        play_info = (
            traverse_obj(
                self._search_json(r'window\.__playinfo__\s*=', webpage, 'play info', video_id, default=None),
                ('data', {dict}))
            or self._download_playinfo(video_id, cid, headers=headers))

        festival_info = {}
        if is_festival:
            festival_info = traverse_obj(initial_state, {
                'uploader': ('videoInfo', 'upName'),
                'uploader_id': ('videoInfo', 'upMid', {str_or_none}),
                'like_count': ('videoStatus', 'like', {int_or_none}),
                'thumbnail': ('sectionEpisodes', lambda _, v: v['bvid'] == video_id, 'cover'),
            }, get_all=False)

        metainfo = {
            **traverse_obj(initial_state, {
                'uploader': ('upData', 'name'),
                'uploader_id': ('upData', 'mid', {str_or_none}),
                'like_count': ('videoData', 'stat', 'like', {int_or_none}),
                'tags': ('tags', ..., 'tag_name'),
                'thumbnail': ('videoData', 'pic', {url_or_none}),
            }),
            **festival_info,
            **traverse_obj(video_data, {
                'description': 'desc',
                'timestamp': ('pubdate', {int_or_none}),
                'view_count': (('viewCount', ('stat', 'view')), {int_or_none}),