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

Code before:
                'title': ('event', 'name', {str}),
                'uploader': ('profile', 'name', {str}),
                'uploader_id': ('profile', 'id', {str_or_none}),
                'release_timestamp': ('stream', 'start', 'timestamp', {int_or_none}),
                'categories': ('event', 'genres', ..., {lambda x: x or None}),
            }),
            **traverse_obj(player_meta, ('initial_event_info', {
                'alt_title': ('title', {str}),
                'thumbnail': ('poster_url', {url_or_none}),
            })),
        }


class ZaikoETicketIE(ZaikoBaseIE):
    _VALID_URL = r'https?://(?:www.)?zaiko\.io/account/eticket/(?P<id>\w{48}=)'
    _TESTS = [{
        'url': 'https://zaiko.io/account/eticket/000000000000000000000000000000000000000000000000=',
        'only_matching': True,
    }]

    def _real_extract(self, url):
        ticket_id = self._match_id(url)

        webpage = self._download_real_webpage(url, ticket_id)
        eticket = self._parse_vue_element_attr('eticket', webpage, ticket_id)
        return self.playlist_result(
            [self.url_result(stream, ZaikoIE) for stream in traverse_obj(eticket, ('streams', ..., 'url'))],
            ticket_id, **traverse_obj(eticket, ('ticket-details', {
                'title': 'event_name',
                'thumbnail': 'event_img_url',
            })))


Review comment (suggestion):
```suggestion
        eticket = self._parse_vue_element_attr('eticket', webpage, ticket_id)

        return self.playlist_result(
```

Code after:
            'formats': formats,
            'live_status': live_status,
            **traverse_obj(stream_meta, {
                'title': ('event', 'name', {str}),
                'uploader': ('profile', 'name', {str}),
                'uploader_id': ('profile', 'id', {str_or_none}),
                'release_timestamp': ('stream', 'start', 'timestamp', {int_or_none}),
                'categories': ('event', 'genres', ..., {lambda x: x or None}),
            }),
            **traverse_obj(player_meta, ('initial_event_info', {
                'alt_title': ('title', {str}),
                'thumbnail': ('poster_url', {url_or_none}),
            })),
        }


class ZaikoETicketIE(ZaikoBaseIE):
    _VALID_URL = r'https?://(?:www.)?zaiko\.io/account/eticket/(?P<id>[\w=-]{49})'
    _TESTS = [{
        'url': 'https://zaiko.io/account/eticket/TZjMwMzQ2Y2EzMXwyMDIzMDYwNzEyMTMyNXw1MDViOWU2Mw==',
        'playlist_count': 1,
        'info_dict': {
            'id': 'f30346ca31-20230607121325-505b9e63',
            'title': 'ZAIKO STREAMING TEST',
            'thumbnail': 'https://media.zkocdn.net/pf_1/1_3wdyjcjyupseatkwid34u',
        },
        'skip': 'Only available with the ticketholding account',
    }]

    def _real_extract(self, url):
        ticket_id = self._match_id(url)
        ticket_id = try_call(
            lambda: base64.urlsafe_b64decode(ticket_id[1:]).decode().replace('|', '-')) or ticket_id

        webpage = self._download_real_webpage(url, ticket_id)
        eticket = self._parse_vue_element_attr('eticket', webpage, ticket_id)

        return self.playlist_result(
            [self.url_result(stream, ZaikoIE) for stream in traverse_obj(eticket, ('streams', ..., 'url'))],
            ticket_id, **traverse_obj(eticket, ('ticket-details', {
                'title': 'event_name',
                'thumbnail': 'event_img_url',
            })))