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

Code before:
        if slug:
            if video_type == 'events':
                return self.url_result(
                    self._search_regex(r'<meta\s+name="externalVideoUrl"\s+content="([^"]+)"', webpage, 'videoUrl'), url_transparent=True, **metainfo, **{
                        'timestamp': parse_iso8601(self._search_regex(
                            r'<meta\s+name="startDate"\s+content="([^"]+)"', webpage, 'date', default=None)),
                    })
            else:
                entry_id = self._search_regex(r'<meta name="entryId" content="([^"]+)"', webpage, 'entryId')
                video_info = self._download_json(
                    f'https://learn.microsoft.com/api/video/public/v1/entries/{entry_id}', video_id)
                return {
                    'id': entry_id,
                    'formats': self._extract_ism(video_info['publicVideo']['adaptiveVideoUrl'], video_id),
                    'subtitles': self._sub_to_dict(traverse_obj(video_info, ('publicVideo', 'captions', ..., {
                        'tag': ('language', {str}),
                        'url': ('url', {url_or_none}),
                    }))),
                    **metainfo,
                    **traverse_obj(video_info, {
                        'timestamp': ('createTime', {parse_iso8601}),
                        'thumbnails': ('publicVideo', 'thumbnailOtherSizes', ..., {lambda x: {'url': x}}),
                    }),
                }
        else:
            url_base = f'https://learn.microsoft.com/api/contentbrowser/search/{video_type}/{series}/{"sessions" if video_type == "events" else "episodes"}?locale=en-us'
            return self.playlist_result(self._entries(url_base, video_id), video_id, **metainfo)


class MicrosoftBuildIE(MicrosoftMediusBaseIE):
    _VALID_URL = [
        r'https?://build\.microsoft\.com/[\w\-]+/sessions/(?P<id>[0-9a-f\-]+)',
        r'https?://build\.microsoft\.com/[\w\-]+/(?P<id>sessions)/?(?:[?#]|$)',
    ]

    _TESTS = [{
        'url': 'https://build.microsoft.com/en-US/sessions/49e81029-20f0-485b-b641-73b7f9622656?source=sessions',
        'info_dict': {
            'id': '81215af5-c813-4dcd-aede-94f4e1a7daa3',
            'ext': 'ismv',
            'title': 'Microsoft Build opening',
            'description': 'md5:756ab1fb60bdc6923d627803694e9cc5',
            'timestamp': 1684857600,
            'upload_date': '20230523',
            'thumbnail': r're:https://mediusimg\.event\.microsoft\.com/video-\d+/thumbnail\.jpg.*',
        },
    }, {
        'url': 'https://build.microsoft.com/en-US/sessions',
        'info_dict': {
            'id': 'sessions',
        },

Review comment (suggestion):
```suggestion
            url_base = f'https://learn.microsoft.com/api/contentbrowser/search/{video_type}/{series}/{"sessions" if video_type == "events" else "episodes"}'
```
refer to the other comment

Code after:
            'description': 'md5:7bbbfb593d21c2cf2babc3715ade6b88',
            'timestamp': 1676339547,
            'upload_date': '20230214',
            'thumbnail': r're:https://learn\.microsoft\.com/video/media/.*\.png',
            'subtitles': 'count:14',
        },
    }]

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

        entry_id = self._html_search_meta('entryId', webpage, 'entryId', fatal=True)
        video_info = self._download_json(
            f'https://learn.microsoft.com/api/video/public/v1/entries/{entry_id}', video_id)
        return {
            'id': entry_id,
            'formats': self._extract_ism(video_info['publicVideo']['adaptiveVideoUrl'], video_id),
            'subtitles': self._sub_to_dict(traverse_obj(video_info, (
                'publicVideo', 'captions', lambda _, v: url_or_none(v['url']), {
                    'tag': ('language', {str}),
                    'url': 'url',
                }))),
            'title': self._og_search_title(webpage),
            'description': self._og_search_description(webpage),
            **traverse_obj(video_info, {
                'timestamp': ('createTime', {parse_iso8601}),
                'thumbnails': ('publicVideo', 'thumbnailOtherSizes', ..., {'url': {url_or_none}}),
            }),
        }


class MicrosoftLearnSessionIE(InfoExtractor):
    _VALID_URL = r'https?://learn\.microsoft\.com/(?:[\w-]+/)?events/[\w-]+/(?P<id>[^?#/]+)'
    _TESTS = [{
        'url': 'https://learn.microsoft.com/en-us/events/build-2022/ts01-rapidly-code-test-ship-from-secure-cloud-developer-environments',
        'info_dict': {
            'id': '9640d86c-f513-4889-959e-5dace86e7d2b',
            'ext': 'ismv',
            'title': 'Rapidly code, test and ship from secure cloud developer environments - Events',
            'description': 'md5:f26c1a85d41c1cffd27a0279254a25c3',
            'timestamp': 1653408600,
            'upload_date': '20220524',
            'thumbnail': r're:https://mediusimg\.event\.microsoft\.com/video-\d+/thumbnail\.jpg.*',
        },
    }]

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