New extraction tactic for Kaltura ID using image URL

youtube_dl/extractor/uno.py

@@ -12,7 +12,7 @@ class UNOIE(InfoExtractor):
     _VALID_URL = r'https?://media\.un\.org/(?:\w+/)+(?P<id>k\d[\w]+)'
     _TESTS = [{
         'url': 'https://media.un.org/en/asset/k1r/k1r3vy9ikk',
-        # 'md5': 'd91851bf9af73c0ad9b2cdf76c127fbb',
+        'md5': '981c41cb283227f079d1e5059fd0d30c',
         'info_dict': {
             'id': '1_r3vy9ikk',
             'ext': 'mp4',
@@ -23,17 +23,31 @@ class UNOIE(InfoExtractor):
             'timestamp': 1625216872,
             'upload_date': '20210702',
             'uploader_id': 'UNWebTV_New_York',
+        }
+    }, {
+        'url': 'https://media.un.org/en/asset/k12/k12gpkg3qx',
+        'md5': '5978503ca886a922a0f00cf5a7e82395',
+        'info_dict': {
+            'id': '1_vohfjqkj',
+            'ext': 'mp4',
+            'title': '1851st Meeting, 81st session Committee on the Elimination of Discrimination Against Women (CEDAW)',
+            'description': 'Informal meeting with NGOs and human rights institutions - 1851st Meeting, 81st session CEDAW',
+            'thumbnail': 're:https?://.+/thumbnail/.+',
+            'duration': 3502,
+            'timestamp': 1644235332,
+            'upload_date': '20220207',
+            'uploader_id': 'nathalie.minard@un.org',
         },
     }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
-        video_id = video_id[1:2] + '_' + video_id[2:]
         webpage = self._download_webpage(url, video_id)
+        partner_id = self._search_regex(r'partnerId\s*:\s*(\d+)\b', webpage, 'Partner ID')
+        video_id = self._search_regex(r'/p/%s(?:/\w+)+?/entry_id/(\w+)/' % (partner_id, ), webpage, 'Kaltura ID')
         title = (
             self._html_search_meta(('title', 'og:title'), webpage)
             or self._html_search_regex(r'<title\b[^>]*>([^<]+)</title\b', webpage, 'title').rsplit('|', 1)[0]).strip()
-        partner_id = self._search_regex(r'partnerId\s*:\s*(\d+)\b', webpage, 'Partner ID')
         result = self.url_result(
             'kaltura:%s:%s' % (partner_id, video_id), 'Kaltura',
             video_title=title,