[extractor/youtube:tab] Extract metadata from channel items (#5569)

Authored by: coletdjnz

yt_dlp/extractor/youtube.py

@@ -4382,6 +4382,25 @@ class YoutubeTabBaseInfoExtractor(YoutubeBaseInfoExtractor):
             elif key.startswith('grid') and key.endswith('Renderer'):
                 return renderer
 
+    def _extract_channel_renderer(self, renderer):
+        channel_id = renderer['channelId']
+        title = self._get_text(renderer, 'title')
+        channel_url = f'https://www.youtube.com/channel/{channel_id}'
+        return {
+            '_type': 'url',
+            'url': channel_url,
+            'id': channel_id,
+            'ie_key': YoutubeTabIE.ie_key(),
+            'channel': title,
+            'channel_id': channel_id,
+            'channel_url': channel_url,
+            'title': title,
+            'channel_follower_count': self._get_count(renderer, 'subscriberCountText'),
+            'thumbnails': self._extract_thumbnails(renderer, 'thumbnail'),
+            'playlist_count': self._get_count(renderer, 'videoCountText'),
+            'description': self._get_text(renderer, 'descriptionSnippet'),
+        }
+
     def _grid_entries(self, grid_renderer):
         for item in grid_renderer['items']:
             if not isinstance(item, dict):
@@ -4407,9 +4426,7 @@ class YoutubeTabBaseInfoExtractor(YoutubeBaseInfoExtractor):
             # channel
             channel_id = renderer.get('channelId')
             if channel_id:
-                yield self.url_result(
-                    'https://www.youtube.com/channel/%s' % channel_id,
-                    ie=YoutubeTabIE.ie_key(), video_title=title)
+                yield self._extract_channel_renderer(renderer)
                 continue
             # generic endpoint URL support
             ep_url = urljoin('https://www.youtube.com/', try_get(
@@ -5762,7 +5779,6 @@ class YoutubeTabIE(YoutubeTabBaseInfoExtractor):
             'uploader': 'cole-dlp-test-acc',
             'channel_id': 'UCiu-3thuViMebBjw_5nWYrA',
             'channel': 'cole-dlp-test-acc',
-            'channel_follower_count': int,
         },
         'playlist_mincount': 1,
         'params': {'extractor_args': {'youtube': {'lang': ['ja']}}},
@@ -5930,7 +5946,6 @@ class YoutubeTabIE(YoutubeTabBaseInfoExtractor):
             'title': 'cole-dlp-test-acc - Shorts',
             'uploader_id': 'UCiu-3thuViMebBjw_5nWYrA',
             'channel': 'cole-dlp-test-acc',
-            'channel_follower_count': int,
             'description': 'test description',
             'channel_id': 'UCiu-3thuViMebBjw_5nWYrA',
             'channel_url': 'https://www.youtube.com/channel/UCiu-3thuViMebBjw_5nWYrA',
@@ -5976,8 +5991,40 @@ class YoutubeTabIE(YoutubeTabBaseInfoExtractor):
                 'channel': str,
             }
         }],
-        'params': {'extract_flat': True},
+        'params': {'extract_flat': True, 'playlist_items': '1'},
         'playlist_mincount': 1
+    }, {
+        # Channel renderer metadata. Contains number of videos on the channel
+        'url': 'https://www.youtube.com/channel/UCiu-3thuViMebBjw_5nWYrA/channels',
+        'info_dict': {
+            'id': 'UCiu-3thuViMebBjw_5nWYrA',
+            'title': 'cole-dlp-test-acc - Channels',
+            'uploader_id': 'UCiu-3thuViMebBjw_5nWYrA',
+            'channel': 'cole-dlp-test-acc',
+            'description': 'test description',
+            'channel_id': 'UCiu-3thuViMebBjw_5nWYrA',
+            'channel_url': 'https://www.youtube.com/channel/UCiu-3thuViMebBjw_5nWYrA',
+            'tags': [],
+            'uploader': 'cole-dlp-test-acc',
+            'uploader_url': 'https://www.youtube.com/channel/UCiu-3thuViMebBjw_5nWYrA',
+
+        },
+        'playlist': [{
+            'info_dict': {
+                '_type': 'url',
+                'ie_key': 'YoutubeTab',
+                'url': 'https://www.youtube.com/channel/UC-lHJZR3Gqxm24_Vd_AJ5Yw',
+                'id': 'UC-lHJZR3Gqxm24_Vd_AJ5Yw',
+                'channel_id': 'UC-lHJZR3Gqxm24_Vd_AJ5Yw',
+                'title': 'PewDiePie',
+                'channel': 'PewDiePie',
+                'channel_url': 'https://www.youtube.com/channel/UC-lHJZR3Gqxm24_Vd_AJ5Yw',
+                'thumbnails': list,
+                'channel_follower_count': int,
+                'playlist_count': int
+            }
+        }],
+        'params': {'extract_flat': True},
     }]
 
     @classmethod
@@ -6531,6 +6578,30 @@ class YoutubeSearchURLIE(YoutubeTabBaseInfoExtractor):
             #     'title': '#cats',
             # }],
         },
+    }, {
+        # Channel results
+        'url': 'https://www.youtube.com/results?search_query=kurzgesagt&sp=EgIQAg%253D%253D',
+        'info_dict': {
+            'id': 'kurzgesagt',
+            'title': 'kurzgesagt',
+        },
+        'playlist': [{
+            'info_dict': {
+                '_type': 'url',
+                'id': 'UCsXVk37bltHxD1rDPwtNM8Q',
+                'url': 'https://www.youtube.com/channel/UCsXVk37bltHxD1rDPwtNM8Q',
+                'ie_key': 'YoutubeTab',
+                'channel': 'Kurzgesagt – In a Nutshell',
+                'description': 'md5:4ae48dfa9505ffc307dad26342d06bfc',
+                'title': 'Kurzgesagt – In a Nutshell',
+                'channel_id': 'UCsXVk37bltHxD1rDPwtNM8Q',
+                'playlist_count': int,  # XXX: should have a way of saying > 1
+                'channel_url': 'https://www.youtube.com/channel/UCsXVk37bltHxD1rDPwtNM8Q',
+                'thumbnails': list
+            }
+        }],
+        'params': {'extract_flat': True, 'playlist_items': '1'},
+        'playlist_mincount': 1,
     }, {
         'url': 'https://www.youtube.com/results?q=test&sp=EgQIBBgB',
         'only_matching': True,