Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/s4c.py (Python)

Code before:
        video_id = self._match_id(url)
        details = self._download_json(
            f'https://www.s4c.cymru/df/full_prog_details?lang=e&programme_id={video_id}',
            video_id, fatal=False)

        filename = self._download_json(
            'https://player-api.s4c-cdn.co.uk/player-configuration/prod', video_id, query={
                'programme_id': video_id,
                'signed': '0',
                'lang': 'en',
                'mode': 'od',
                'appId': 'clic',
                'streamName': '',
            }, note='Downloading player config JSON')['filename']
        m3u8_url = self._download_json(
            'https://player-api.s4c-cdn.co.uk/streaming-urls/prod', video_id, query={
                'mode': 'od',
                'application': 'clic',
                'region': 'WW',
                'extra': 'false',
                'thirdParty': 'false',
                'filename': filename,
            }, note='Downloading streaming urls JSON')['hls']

        formats, subtitles = self._extract_m3u8_formats_and_subtitles(m3u8_url, video_id, 'mp4', m3u8_id='hls')
        return {
            'id': video_id,
            'formats': formats,
            'subtitles': subtitles,
            **traverse_obj(details, ('full_prog_details', 0, {
                'title': (('programme_title', 'series_title'), {str}),
                'description': ('full_billing', {str.strip}),
                'duration': ('duration', {lambda x: int(x) * 60}),
            }), get_all=False),
        }


Review comment (refactor):
```suggestion
            }, note='Downloading streaming urls JSON')['hls']
        formats, subtitles = self._extract_m3u8_formats_and_subtitles(m3u8_url, video_id, 'mp4', m3u8_id='hls')

        return {
```

Code after:
            video_id, fatal=False)

        filename = self._download_json(
            'https://player-api.s4c-cdn.co.uk/player-configuration/prod', video_id, query={
                'programme_id': video_id,
                'signed': '0',
                'lang': 'en',
                'mode': 'od',
                'appId': 'clic',
                'streamName': '',
            }, note='Downloading player config JSON')['filename']
        m3u8_url = self._download_json(
            'https://player-api.s4c-cdn.co.uk/streaming-urls/prod', video_id, query={
                'mode': 'od',
                'application': 'clic',
                'region': 'WW',
                'extra': 'false',
                'thirdParty': 'false',
                'filename': filename,
            }, note='Downloading streaming urls JSON')['hls']
        formats, subtitles = self._extract_m3u8_formats_and_subtitles(m3u8_url, video_id, 'mp4', m3u8_id='hls')

        return {
            'id': video_id,
            'formats': formats,
            'subtitles': subtitles,
            **traverse_obj(details, ('full_prog_details', 0, {
                'title': (('programme_title', 'series_title'), {str}),
                'description': ('full_billing', {str.strip}),
                'duration': ('duration', {lambda x: int(x) * 60}),
            }), get_all=False),
        }