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

Code before:
            'format': 'bestvideo',
        },
    }, {
        'url': 'https://zen.yandex.ru/video/watch/6002240ff8b1af50bb2da5e3',
        'info_dict': {
            'id': '6002240ff8b1af50bb2da5e3',
            'ext': 'mp4',
            'title': 'Извержение вулкана из спичек: зрелищный опыт',
            'description': 'Канал Lavina собрал из сотен спичек внушительную модель вулкана и поджег ее, превратив спичечную гору в огромный столб пламени!',
            'uploader': 'Популярная механика',
        },
        'params': {
            'skip_download': 'm3u8',
        },
    }, {
        'url': 'https://zen.yandex.ru/media/id/606fd806cc13cb3c58c05cf5/novyi-samsung-fold-3-moskvich-barahlit-612f93b7f8d48e7e945792a2?from=channel&rid=2286618386.482.1630817595976.42360',
        'only_matching': True,
    }]

    def _real_extract(self, url):
        id = self._match_id(url)
        webpage = self._download_webpage(url, id)
        data_json = self._parse_json(
            self._search_regex(r'data\s*=\s*({["\']_*serverState_*video.+?});', webpage, 'metadata'), id)
        serverstate = self._search_regex(r'(_+serverState_+video-site_[^_]+_+)', webpage, 'server state').replace(
            'State', 'Settings')
        uploader = self._search_regex(r'(<a\s*class=["\']card-channel-link[^"\']+["\'][^>]+>)', webpage, 'uploader',
                                      default='<a>')
        uploader_name = extract_attributes(uploader).get('aria-label')
        video_json = try_get(data_json, lambda x: x[serverstate]['exportData']['video'], dict)
        stream_urls = try_get(video_json, lambda x: x['video']['streams'])
        formats = []
        for s_url in stream_urls:
            if 'manifest.mpd' in s_url:
                formats.extend(self._extract_mpd_formats(s_url, id, mpd_id='dash'))
            elif 'master.m3u8' in s_url:
                formats.extend(self._extract_m3u8_formats(s_url, id))
        self._sort_formats(formats)
        return {
            'id': id,
            'title': video_json.get('title') or self._og_search_title(webpage),
            'formats': formats,
            'duration': int_or_none(video_json.get('duration')),
            'view_count': int_or_none(video_json.get('views')),
            'uploader': uploader_name or data_json.get('authorName') or try_get(data_json, lambda x: x['publisher']['name']),
            'description': self._og_search_description(webpage) or try_get(data_json, lambda x: x['og']['description']),
            'thumbnail': self._og_search_thumbnail(webpage) or try_get(data_json, lambda x: x['og']['imageUrl']),
        }


class ZenYandexChannelIE(InfoExtractor):

Review comment (suggestion):
```suggestion
        serverstate = self._search_regex(r'(_+serverState_+video-site_[^_]+_+)',
                                         webpage, 'server state').replace('State', 'Settings')
```

Code after:
            'format': 'bestvideo',
        },
    }, {
        'url': 'https://zen.yandex.ru/video/watch/6002240ff8b1af50bb2da5e3',
        'info_dict': {
            'id': '6002240ff8b1af50bb2da5e3',
            'ext': 'mp4',
            'title': 'Извержение вулкана из спичек: зрелищный опыт',
            'description': 'md5:053ad3c61b5596d510c9a199dc8ee633',
            'uploader': 'Популярная механика',
        },
        'params': {
            'skip_download': 'm3u8',
        },
    }, {
        'url': 'https://zen.yandex.ru/media/id/606fd806cc13cb3c58c05cf5/novyi-samsung-fold-3-moskvich-barahlit-612f93b7f8d48e7e945792a2?from=channel&rid=2286618386.482.1630817595976.42360',
        'only_matching': True,
    }]

    def _real_extract(self, url):
        id = self._match_id(url)
        webpage = self._download_webpage(url, id)
        data_json = self._parse_json(
            self._search_regex(r'data\s*=\s*({["\']_*serverState_*video.+?});', webpage, 'metadata'), id)
        serverstate = self._search_regex(r'(_+serverState_+video-site_[^_]+_+)',
                                         webpage, 'server state').replace('State', 'Settings')
        uploader = self._search_regex(r'(<a\s*class=["\']card-channel-link[^"\']+["\'][^>]+>)',
                                      webpage, 'uploader', default='<a>')
        uploader_name = extract_attributes(uploader).get('aria-label')
        video_json = try_get(data_json, lambda x: x[serverstate]['exportData']['video'], dict)
        stream_urls = try_get(video_json, lambda x: x['video']['streams'])
        formats = []
        for s_url in stream_urls:
            ext = determine_ext(s_url)
            if ext == 'mpd':
                formats.extend(self._extract_mpd_formats(s_url, id, mpd_id='dash'))
            elif ext == 'm3u8':
                formats.extend(self._extract_m3u8_formats(s_url, id, 'mp4'))
        self._sort_formats(formats)
        return {
            'id': id,
            'title': video_json.get('title') or self._og_search_title(webpage),
            'formats': formats,
            'duration': int_or_none(video_json.get('duration')),
            'view_count': int_or_none(video_json.get('views')),
            'uploader': uploader_name or data_json.get('authorName') or try_get(data_json, lambda x: x['publisher']['name']),
            'description': self._og_search_description(webpage) or try_get(data_json, lambda x: x['og']['description']),
            'thumbnail': self._og_search_thumbnail(webpage) or try_get(data_json, lambda x: x['og']['imageUrl']),
        }