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

Code before:
                'artist': artist,
                'track': title,
                'formats': [{
                    'url': audio['url'],
                    'ext': 'm4a',
                    'vcodec': 'none',
                    'acodec': 'mp3',
                    'container': 'm4a_dash',
                }],
            })

        entries.extend(self.url_result(urljoin(url, entry), VKIE) for entry in set(re.findall(
            r'<a[^>]+href=(?:["\'])(/video(?:-?[\d_]+)[^"\']*)',
            get_element_html_by_id('wl_post_body', webpage))))

        return self.playlist_result(
            entries, post_id, join_nonempty(uploader, f'Wall post {post_id}', delim=' - '),
            clean_html(get_element_by_class('wall_post_text', webpage)))


class VKPlayBaseIE(InfoExtractor):
    def _extract_initial_state(self, url, video_id):
        webpage = self._download_webpage(url, video_id)
        initial_state_json = self._search_regex(r'id="initial-state"[^>]*>([^<]+)</script>', webpage, 'initial_state')
        initial_state = self._parse_json(initial_state_json, video_id, fatal=False)
        return initial_state

    def _parse_playurls(self, playurls, video_id):
        formats = []
        for playurl in playurls:
            if not playurl.get('url', None):
                continue
            elif '.m3u8' in playurl['url']:
                try:
                    formats.extend(self._extract_m3u8_formats(playurl['url'], video_id))
                except Exception:
                    pass
            else:
                formats.append(playurl)
        return formats


class VKPlayIE(VKPlayBaseIE):
    _VALID_URL = r'https?://vkplay\.live/(?P<username>[^/]+)/record/(?P<id>[a-f0-9\-]+)'
    _TESTS = [{
        'url': 'https://vkplay.live/zitsmann/record/f5e6e3b5-dc52-4d14-965d-0680dd2882da',
        'info_dict': {
            'id': 'f5e6e3b5-dc52-4d14-965d-0680dd2882da',
            'ext': 'mp4',
            'title': 'Atomic Heart (пробуем!) спасибо подписчику EKZO!',
            'uploader': 'ZitsmanN',

Review comment (suggestion):
`_search_json` makes it easier/more concise
```suggestion
        return self._search_json(
            r'<script[^>]+\bid="initial-state"[^>]*>', webpage, 'initial state', video_id, fatal=False)
```

Code after:
                'duration': int_or_none(audio.get('duration')),
                'uploader': uploader,
                'artist': artist,
                'track': title,
                'formats': [{
                    'url': audio['url'],
                    'ext': 'm4a',
                    'vcodec': 'none',
                    'acodec': 'mp3',
                    'container': 'm4a_dash',
                }],
            })

        entries.extend(self.url_result(urljoin(url, entry), VKIE) for entry in set(re.findall(
            r'<a[^>]+href=(?:["\'])(/video(?:-?[\d_]+)[^"\']*)',
            get_element_html_by_id('wl_post_body', webpage))))

        return self.playlist_result(
            entries, post_id, join_nonempty(uploader, f'Wall post {post_id}', delim=' - '),
            clean_html(get_element_by_class('wall_post_text', webpage)))


class VKPlayBaseIE(InfoExtractor):
    _RESOLUTIONS = {
        'tiny': '256x144',
        'lowest': '426x240',
        'low': '640x360',
        'medium': '852x480',
        'high': '1280x720',
        'full_hd': '1920x1080',
        'quad_hd': '2560x1440',
    }

    def _extract_from_initial_state(self, url, video_id, path):
        webpage = self._download_webpage(url, video_id)
        video_info = traverse_obj(self._search_json(
            r'<script[^>]+\bid="initial-state"[^>]*>', webpage, 'initial state', video_id),
            path, expected_type=dict)
        if not video_info:
            raise ExtractorError('Unable to extract video info from html inline initial state')
        return video_info

    def _extract_formats(self, stream_info, video_id):
        formats = []
        for stream in traverse_obj(stream_info, (
                'data', 0, 'playerUrls', lambda _, v: url_or_none(v['url']) and v['type'])):
            url = stream['url']
            format_id = str_or_none(stream['type'])
            if format_id in ('hls', 'live_hls', 'live_playback_hls') or '.m3u8' in url:
                formats.extend(self._extract_m3u8_formats(url, video_id, m3u8_id=format_id, fatal=False))
            elif format_id == 'dash':