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

Code before:
        for current_chat in video_info.get('chats'):
            subtitles.setdefault('live_chat', []).append({'url': url_or_none(current_chat['url'])})

        return {
            'duration': duration,
            'formats': formats,
            'id': video_id,
            'timestamp': parse_iso8601(upload_date),
            'subtitles': subtitles,
            'title': title,
        }


class BlackboardCollaborateLaunchIE(InfoExtractor):
    _VALID_URL = r'https?://[a-z]+\.bbcollab\.com/launch/(?P<token>[\w\.\-]+)'

    _TESTS = [
        {
            'url': 'https://au.bbcollab.com/launch/eyJhbGciOiJIUzI1NiJ9.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.xuELw4EafEwUMoYcCHidGn4Tw9O1QCbYHzYGJUl0kKk',
            'only_matching': True,
        },
    ]

    def _real_extract(self, url):
        token = self._match_valid_url(url)['token']
        video_id = traverse_obj(json.loads(base64.b64decode(token.split('.')[1] + '===')), ('resourceAccessTicket', 'resourceId'))

        redirect_url = self._request_webpage(url, video_id=video_id).url
        return self.url_result(redirect_url,
                               ie=BlackboardCollaborateIE.ie_key(), video_id=video_id)


Review comment (suggestion):
- use `..utils.jwt_decode_hs256`
- it's ok to make this fatal since it's assumed the url isn't valid if the token doesn't decode (or doesn't decode into the expected json structure)
```suggestion
        token = self._match_id(url)
        video_id = jwt_decode_hs256(token)['resourceAccessTicket']['resourceId'] 
```

Code after:
                'title': ('name', {str}),
                'timestamp': ('created', {parse_iso8601}),
                'duration': ('duration', {int_or_none(scale=1000)}),
            }),
            'formats': formats,
            'id': video_id,
            'subtitles': subtitles,
        }


class BlackboardCollaborateLaunchIE(InfoExtractor):
    _VALID_URL = r'https?://[a-z]+\.bbcollab\.com/launch/(?P<id>[^/?#]+)'

    _TESTS = [
        {
            'url': 'https://au.bbcollab.com/launch/eyJhbGciOiJIUzI1NiJ9.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.xuELw4EafEwUMoYcCHidGn4Tw9O1QCbYHzYGJUl0kKk',
            'only_matching': True,
        },
        {
            'url': 'https://us.bbcollab.com/launch/eyJhbGciOiJIUzI1NiJ9.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.yOhRZNaIjXYoMYMpcTzgjZJCnIFaYf2cAzbco8OAxlY',
            'only_matching': True,
        },
        {
            'url': 'https://eu.bbcollab.com/launch/eyJhbGciOiJIUzI1NiJ9.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.Xj4ymojYLwZ1vKPKZ-KxjpqQvFXoJekjRaG0npngwWs',
            'only_matching': True,
        },
    ]

    def _real_extract(self, url):
        token = self._match_id(url)
        video_id = jwt_decode_hs256(token)['resourceAccessTicket']['resourceId']

        redirect_url = self._request_webpage(url, video_id).url
        if self.suitable(redirect_url):
            raise UnsupportedError(redirect_url)
        return self.url_result(redirect_url, BlackboardCollaborateIE, video_id)