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

Code before:
                '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')

        chat_room_url = traverse_obj(self._download_json(
            f'{self.PIA_LIVE_API_URL}/perf/chat-tag-list/{program_code}/{article_code}', program_code,
            data=payload, headers={'Content-Type': content_type, 'Referer': self.PLAYER_ROOT_URL},
            note='Fetching chat info', errnote='Unable to fetch chat info', fatal=False),
            ('data', 'chat_one_tag', {extract_attributes}, 'src', {url_or_none}))

        return self.url_result(
            extract_attributes(player_tag_list['data']['movie_one_tag'])['src'], url_transparent=True,
            video_title=self._html_extract_title(webpage), display_id=program_code,
            __post_extractor=self.extract_comments(program_code, chat_room_url))

    def _get_comments(self, video_id, chat_room_url):
        if not chat_room_url:
            return
        if comment_page := self._download_webpage(
                chat_room_url, video_id, headers={'Referer': f'{self.PLAYER_ROOT_URL}'},

Review comment (performance):
That appended date is just for cache busting. Imo. we don't need to extract the exact date the website uses from the HTML.

Actually, since the APIKEY has been unchanged [since 2022](https://web.archive.org/web/20221208024332id_/https://player.pia-live.jp/statics/js/s_prod?202211082), I'd just hardcode the api key and save on one request
```suggestion
```
If they start regularly rotating it, we can add the extraction logic

Code after:
        '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})',
                start_info, 'start_info', fatal=False, group=('date', 'time'))
            if date and time:
                release_timestamp_str = f'{date} {time} +09:00'
                release_timestamp = unified_timestamp(release_timestamp_str)
                self.raise_no_formats(f'The video will be available after {release_timestamp_str}', expected=True)
                return {
                    'id': program_code,
                    'title': title,
                    'live_status': 'is_upcoming',
                    'release_timestamp': release_timestamp,
                }

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