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

Code before:
            'params': {
                'getcomments': True,
                'skip_download': True,
                'ignore_no_formats_error': True,
            },
        },
        {
            'url': 'https://player.pia-live.jp/stream/4JagFBEIM14s_hK9aXHKf3k3F3bY5eoHFQxu68TC6krJdu0GVBVbVy01IwpJ6J3qBEm3d9TCTt1d0eWpsZGj7DrOjVOmS7GAWGwyscMgiThopJvzgWC4H5b-7XQjAfRZ',
            'info_dict': {
                'id': '9ce8b8ba-f6d1-4d1f-83a0-18c3148ded93',
                'display_id': '2431867_002',
                'title': 'こながめでたい日２０２４の視聴ページ | PIA LIVE STREAM(ぴあライブストリーム)',
                'live_status': 'was_live',
                'comment_count': int,
            },
            'params': {
                'getcomments': True,
                'skip_download': True,
                'ignore_no_formats_error': True,
            },
        },
    ]

    def _extract_vars(self, variable, html):
        return self._search_regex(
            rf'(?:var|const)\s+{variable}\s*=\s*(["\'])(?P<value>(?:(?!\1).)+)\1',
            html, 'variable', group='value', default=None)

    def _real_extract(self, url):
        video_key = self._match_id(url)
        webpage = self._download_webpage(url, video_key)

        program_code = self._extract_vars('programCode', webpage)
        article_code = self._extract_vars('articleCode', webpage)

        prod_configure = self._download_webpage(
            self.PLAYER_ROOT_URL + self._search_regex(
                r'<script[^>]+src=(["\'])(?P<url>/statics/js/s_prod\?(?:(?!\1).)+)\1',
                webpage, 'prod configure page url', group='url'),
            program_code, headers={'Referer': self.PLAYER_ROOT_URL},
            note='Fetching prod configure page', errnote='Unable to fetch prod configure page')

        payload, content_type = multipart_encode({
            'play_url': video_key,
            'api_key': self._extract_vars('APIKEY', prod_configure)})

        player_tag_list = self._download_json(
            f'{self.PIA_LIVE_API_URL}/perf/player-tag-list/{program_code}', program_code,
            data=payload, headers={'Content-Type': content_type, 'Referer': self.PLAYER_ROOT_URL},
            note='Fetching player tag list', errnote='Unable to fetch player tag list')


Review comment (suggestion):
Just in case they start using `let` in the future
```suggestion
            rf'(?:var|const|let)\s+{variable}\s*=\s*(["\'])(?P<value>(?:(?!\1).)+)\1',
```

Code after:
    _TESTS = [{
        'url': 'https://player.pia-live.jp/stream/4JagFBEIM14s_hK9aXHKf3k3F3bY5eoHFQxu68TC6krUDqGOwN4d61dCWQYOd6CTxl4hjya9dsfEZGsM4uGOUdax60lEI4twsXGXf7crmz8Gk__GhupTrWxA7RFRVt76',
        'info_dict': {
            'id': '88f3109a-f503-4d0f-a9f7-9f39ac745d84',
            'display_id': '2431867_001',
            'title': 'こながめでたい日２０２４の視聴ページ | PIA LIVE STREAM(ぴあライブストリーム)',
            'live_status': 'was_live',
            'comment_count': int,
        },
        'params': {
            'getcomments': True,
            'skip_download': True,
            'ignore_no_formats_error': True,
        },
        'skip': 'The video is no longer available',
    }, {
        'url': 'https://player.pia-live.jp/stream/4JagFBEIM14s_hK9aXHKf3k3F3bY5eoHFQxu68TC6krJdu0GVBVbVy01IwpJ6J3qBEm3d9TCTt1d0eWpsZGj7DrOjVOmS7GAWGwyscMgiThopJvzgWC4H5b-7XQjAfRZ',
        'info_dict': {
            'id': '9ce8b8ba-f6d1-4d1f-83a0-18c3148ded93',
            'display_id': '2431867_002',
            'title': 'こながめでたい日２０２４の視聴ページ | PIA LIVE STREAM(ぴあライブストリーム)',
            'live_status': 'was_live',
            'comment_count': int,
        },
        'params': {
            'getcomments': True,
            'skip_download': True,
            'ignore_no_formats_error': True,
        },
        'skip': 'The video is no longer available',
    }]

    def _extract_var(self, variable, html):
        return self._search_regex(
            rf'(?:var|const|let)\s+{variable}\s*=\s*(["\'])(?P<value>(?:(?!\1).)+)\1',
            html, f'variable {variable}', group='value')

    def _real_extract(self, url):
        video_key = self._match_id(url)
        webpage = self._download_webpage(url, video_key)

        program_code = self._extract_var('programCode', webpage)
        article_code = self._extract_var('articleCode', webpage)
        title = self._html_extract_title(webpage)

        if get_element_html_by_class('play-end', webpage):
            raise ExtractorError('The video is no longer available', expected=True, video_id=program_code)

        if start_info := clean_html(get_element_by_class('play-waiting__date', webpage)):
            date, time = self._search_regex(
                r'(?P<date>\d{4}/\d{1,2}/\d{1,2})\([月火水木金土日]\)(?P<time>\d{2}:\d{2})',