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

Code before:
                else:
                    formats.append({'url': source_url})

            id = item.get('id')
            title = item.get('title')
            if id and id.startswith('v') and not title:
                title = traverse_obj(
                    media_json, ('audio', lambda _, v: v['id'][1:] == id[1:], 'title',
                                 {lambda x: x and f'{x} - Video Version'}), get_all=False)

            entries.append({
                'formats': formats,
                'thumbnail': urljoin(url, player_json.get('poster')),
                'id': id,
                'title': title,
                'duration': traverse_obj(item, ('duration', {int_or_none})),
            })

        if len(entries) == 1:
            return entries[0]

        return self.playlist_result(entries, video_id)


class LSMLTVEmbedIE(InfoExtractor):
    _VALID_URL = r'https?://ltv\.lsm\.lv/embed.*[?&]c=(?P<id>[^&]+)'
    _TESTS = [{
        'url': 'https://ltv.lsm.lv/embed?c=eyJpdiI6IjQzbHVUeHAyaDJiamFjcjdSUUFKdnc9PSIsInZhbHVlIjoiMHl3SnJNRmd2TmFIdnZwOGtGUUpzODFzUEZ4SVVsN2xoRjliSW9vckUyMWZIWG8vbWVzaFFkY0lhNmRjbjRpaCIsIm1hYyI6ImMzNjdhMzFhNTFhZmY1ZmE0NWI5YmFjZGI1YmJiNGEyNjgzNDM4MjUzMWEwM2FmMDMyZDMwYWM1MDFjZmM5MGIiLCJ0YWciOiIifQ==',
        'md5': '64f72a360ca530d5ed89c77646c9eee5',
        'info_dict': {
            'id': '46k_d23-6000-105',
            'ext': 'mp4',
            'timestamp': 1700589151,
            'duration': 1442,
            'upload_date': '20231121',
            'title': 'D23-6000-105_cetstud',
            'thumbnail': 'https://store.cloudycdn.services/tmsp00060/assets/media/660858/placeholder1700589200.jpg',
        }
    }, {
        'url': 'https://ltv.lsm.lv/embed?enablesdkjs=1&c=eyJpdiI6IncwVzZmUFk2MU12enVWK1I3SUcwQ1E9PSIsInZhbHVlIjoid3FhV29vamc3T2sxL1RaRmJ5Rm1GTXozU0o2dVczdUtLK0cwZEZJMDQ2a3ZIRG5DK2pneGlnbktBQy9uazVleHN6VXhxdWIweWNvcHRDSnlISlNYOHlVZ1lpcTUrcWZSTUZPQW14TVdkMW9aOUtRWVNDcFF4eWpHNGcrT0VZbUNFQStKQk91cGpndW9FVjJIa0lpbkh3PT0iLCJtYWMiOiIyZGI1NDJlMWRlM2QyMGNhOGEwYTM2MmNlN2JlOGRhY2QyYjdkMmEzN2RlOTEzYTVkNzI1ODlhZDlhZjU4MjQ2IiwidGFnIjoiIn0=',
        'md5': 'a1711e190fe680fdb68fd8413b378e87',
        'info_dict': {
            'id': 'wUnFArIPDSY',
            'ext': 'mp4',
            'uploader': 'LTV_16plus',
            'release_date': '20220514',
            'channel_url': 'https://www.youtube.com/channel/UCNMrnafwXD2XKeeQOyfkFCw',
            'view_count': int,
            'availability': 'public',
            'thumbnail': 'https://i.ytimg.com/vi/wUnFArIPDSY/maxresdefault.jpg',
            'release_timestamp': 1652544074,

Review comment (suggestion):
```suggestion
    _VALID_URL = r'https?://ltv\.lsm\.lv/embed\?(?:[^#]+&)?c=(?P<id>[^#&]+)'
```

Code after:
        entries = []
        for item in traverse_obj(media_json, (('audio', 'video'), lambda _, v: v['id'])):
            formats = []
            for source_url in traverse_obj(item, ('sources', ..., 'file', {url_or_none})):
                if determine_ext(source_url) == 'm3u8':
                    formats.extend(self._extract_m3u8_formats(source_url, video_id, fatal=False))
                else:
                    formats.append({'url': source_url})

            id_ = item['id']
            title = item.get('title')
            if id_.startswith('v') and not title:
                title = traverse_obj(
                    media_json, ('audio', lambda _, v: v['id'][1:] == id_[1:], 'title',
                                 {lambda x: x and f'{x} - Video Version'}), get_all=False)

            entries.append({
                'formats': formats,
                'thumbnail': urljoin(url, player_json.get('poster')),
                'id': id_,
                'title': title,
                'duration': traverse_obj(item, ('duration', {int_or_none})),
            })

        if len(entries) == 1:
            return entries[0]

        return self.playlist_result(entries, video_id)


class LSMLTVEmbedIE(InfoExtractor):
    _VALID_URL = r'https?://ltv\.lsm\.lv/embed\?(?:[^#]+&)?c=(?P<id>[^#&]+)'
    _TESTS = [{
        'url': 'https://ltv.lsm.lv/embed?c=eyJpdiI6IjQzbHVUeHAyaDJiamFjcjdSUUFKdnc9PSIsInZhbHVlIjoiMHl3SnJNRmd2TmFIdnZwOGtGUUpzODFzUEZ4SVVsN2xoRjliSW9vckUyMWZIWG8vbWVzaFFkY0lhNmRjbjRpaCIsIm1hYyI6ImMzNjdhMzFhNTFhZmY1ZmE0NWI5YmFjZGI1YmJiNGEyNjgzNDM4MjUzMWEwM2FmMDMyZDMwYWM1MDFjZmM5MGIiLCJ0YWciOiIifQ==',
        'md5': '64f72a360ca530d5ed89c77646c9eee5',
        'info_dict': {
            'id': '46k_d23-6000-105',
            'ext': 'mp4',
            'timestamp': 1700589151,
            'duration': 1442,
            'upload_date': '20231121',
            'title': 'D23-6000-105_cetstud',
            'thumbnail': 'https://store.cloudycdn.services/tmsp00060/assets/media/660858/placeholder1700589200.jpg',
        }
    }, {
        'url': 'https://ltv.lsm.lv/embed?enablesdkjs=1&c=eyJpdiI6IncwVzZmUFk2MU12enVWK1I3SUcwQ1E9PSIsInZhbHVlIjoid3FhV29vamc3T2sxL1RaRmJ5Rm1GTXozU0o2dVczdUtLK0cwZEZJMDQ2a3ZIRG5DK2pneGlnbktBQy9uazVleHN6VXhxdWIweWNvcHRDSnlISlNYOHlVZ1lpcTUrcWZSTUZPQW14TVdkMW9aOUtRWVNDcFF4eWpHNGcrT0VZbUNFQStKQk91cGpndW9FVjJIa0lpbkh3PT0iLCJtYWMiOiIyZGI1NDJlMWRlM2QyMGNhOGEwYTM2MmNlN2JlOGRhY2QyYjdkMmEzN2RlOTEzYTVkNzI1ODlhZDlhZjU4MjQ2IiwidGFnIjoiIn0=',
        'md5': 'a1711e190fe680fdb68fd8413b378e87',
        'info_dict': {
            'id': 'wUnFArIPDSY',
            'ext': 'mp4',
            'uploader': 'LTV_16plus',