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

Code before:
    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage = self._download_webpage(url, video_id)

        player_url = self._search_regex(
            r'var\s+videoUrl\s*=\s*[\'"]([^\'"]+)[\'"]',
            webpage, 'player URL')

        player_config = self._download_json(
            urljoin('https://btvplus.bg', player_url), video_id)['config']

        videojs_data = self._search_json(
            r'videojs\(["\'][^"\']+["\'],', player_config, 'videojs data',
            video_id, transform_source=js_to_json)
        formats = []
        subtitles = {}
        for src in traverse_obj(videojs_data, ('sources', lambda _, v: url_or_none(v['src']))):
            ext = mimetype2ext(src.get('type'))
            if ext == 'm3u8':
                fmts, subs = self._extract_m3u8_formats_and_subtitles(
                    src['src'], video_id, 'mp4', m3u8_id='hls', fatal=False)
                formats.extend(fmts)
                self._merge_subtitles(subs, target=subtitles)
            else:
                self.report_warning(
                    f'Unknown format type {ext}{bug_reports_message()}')

        return {
            'id': video_id,
            'formats': formats,
            'subtitles': subtitles,
            'title': strip_or_none(
                self._og_search_title(webpage, default=None)
                or clean_html(get_element_by_class('product-title', webpage))),
            'thumbnail': self._og_search_thumbnail(webpage, default=None),
            'description': self._og_search_description(webpage, default=None),
        }


Review comment (bug):
```suggestion
                self.report_warning(f'Unknown format type {ext}{bug_reports_message()}')
```

Code after:
    def _real_extract(self, url):
        video_id = self._match_id(url)
        webpage = self._download_webpage(url, video_id)

        player_url = self._search_regex(
            r'var\s+videoUrl\s*=\s*[\'"]([^\'"]+)[\'"]',
            webpage, 'player URL')

        player_config = self._download_json(
            urljoin('https://btvplus.bg', player_url), video_id)['config']

        videojs_data = self._search_json(
            r'videojs\(["\'][^"\']+["\'],', player_config, 'videojs data',
            video_id, transform_source=js_to_json)
        formats = []
        subtitles = {}
        for src in traverse_obj(videojs_data, ('sources', lambda _, v: url_or_none(v['src']))):
            ext = mimetype2ext(src.get('type'))
            if ext == 'm3u8':
                fmts, subs = self._extract_m3u8_formats_and_subtitles(
                    src['src'], video_id, 'mp4', m3u8_id='hls', fatal=False)
                formats.extend(fmts)
                self._merge_subtitles(subs, target=subtitles)
            else:
                self.report_warning(f'Unknown format type {ext}{bug_reports_message()}')

        return {
            'id': video_id,
            'formats': formats,
            'subtitles': subtitles,
            'title': (
                strip_or_none(self._og_search_title(webpage, default=None))
                or clean_html(get_element_by_class('product-title', webpage))),
            'thumbnail': self._og_search_thumbnail(webpage, default=None),
            'description': self._og_search_description(webpage, default=None),
        }