[ie/youtube] Support collaborators (#14677)

- Fix `channel` extraction
- Extract all channels as the `creators` field

Closes #14567
Authored by: seproDev

yt_dlp/extractor/xhamster.py

@@ -60,6 +60,37 @@ def _algo3(self, s):
         s = to_signed_32(s * to_signed_32(0xc2b2ae3d))
         return to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 16))
 
+    def _algo4(self, s):
+        # Custom scrambling function involving a left rotation (ROL)
+        s = self._s = to_signed_32(s + 0x6d2b79f5)
+        s = to_signed_32((s << 7) | ((s & 0xFFFFFFFF) >> 25))  # ROL 7
+        s = to_signed_32(s + 0x9e3779b9)
+        s = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 11))
+        return to_signed_32(s * 0x27d4eb2d)
+
+    def _algo5(self, s):
+        # xorshift variant with a final addition
+        s = to_signed_32(s ^ (s << 7))
+        s = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 9))
+        s = to_signed_32(s ^ (s << 8))
+        s = self._s = to_signed_32(s + 0xa5a5a5a5)
+        return s
+
+    def _algo6(self, s):
+        # LCG (a=0x2c9277b5, c=0xac564b05) with a variable right shift scrambler
+        s = self._s = to_signed_32(s * to_signed_32(0x2c9277b5) + to_signed_32(0xac564b05))
+        s2 = to_signed_32(s ^ ((s & 0xFFFFFFFF) >> 18))
+        shift = (s & 0xFFFFFFFF) >> 27 & 31
+        return to_signed_32((s2 & 0xFFFFFFFF) >> shift)
+
+    def _algo7(self, s):
+        # Weyl Sequence (k=0x9e3779b9) + custom multiply-xor-shift mixing function
+        s = self._s = to_signed_32(s + to_signed_32(0x9e3779b9))
+        e = to_signed_32(s ^ (s << 5))
+        e = to_signed_32(e * to_signed_32(0x7feb352d))
+        e = to_signed_32(e ^ ((e & 0xFFFFFFFF) >> 15))
+        return to_signed_32(e * to_signed_32(0x846ca68b))
+
     def __next__(self):
         return self._algorithm(self._s) & 0xFF
 

yt_dlp/extractor/youtube/_video.py

@@ -1596,6 +1596,70 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         'params': {
             'skip_download': True,
         },
+    }, {
+        # Video with two collaborators
+        'url': 'https://www.youtube.com/watch?v=brhfDfLdDZ8',
+        'info_dict': {
+            'id': 'brhfDfLdDZ8',
+            'ext': 'mp4',
+            'title': 'This is the WORST Movie Science We\'ve Ever Seen',
+            'description': 'md5:8afd0a3cd69ec63438fc573580436f92',
+            'media_type': 'video',
+            'uploader': 'Open Sauce',
+            'uploader_id': '@opensaucelive',
+            'uploader_url': 'https://www.youtube.com/@opensaucelive',
+            'channel': 'Open Sauce',
+            'channel_id': 'UC2EiGVmCeD79l_vZ204DUSw',
+            'channel_url': 'https://www.youtube.com/channel/UC2EiGVmCeD79l_vZ204DUSw',
+            'comment_count': int,
+            'view_count': int,
+            'like_count': int,
+            'age_limit': 0,
+            'duration': 1664,
+            'thumbnail': 'https://i.ytimg.com/vi/brhfDfLdDZ8/hqdefault.jpg',
+            'categories': ['Entertainment'],
+            'tags': ['Moonfall', 'Bad Science', 'Open Sauce', 'Sauce+', 'The Backyard Scientist', 'William Osman', 'Allen Pan'],
+            'creators': ['Open Sauce', 'William Osman 2'],
+            'timestamp': 1759452918,
+            'upload_date': '20251003',
+            'playable_in_embed': True,
+            'availability': 'public',
+            'live_status': 'not_live',
+        },
+        'params': {'skip_download': True},
+    }, {
+        # Video with five collaborators
+        'url': 'https://www.youtube.com/watch?v=_A9KsMbWh4E',
+        'info_dict': {
+            'id': '_A9KsMbWh4E',
+            'ext': 'mp4',
+            'title': '【MV】薫習 - LIVE UNION【RK Music】',
+            'description': 'md5:9b3dc2b91103f303fcc0dac8617e7938',
+            'media_type': 'video',
+            'uploader': 'RK Music',
+            'uploader_id': '@RKMusic_inc',
+            'uploader_url': 'https://www.youtube.com/@RKMusic_inc',
+            'channel': 'RK Music',
+            'channel_id': 'UCiLhMk-gmE2zgF7KGVyqvFw',
+            'channel_url': 'https://www.youtube.com/channel/UCiLhMk-gmE2zgF7KGVyqvFw',
+            'comment_count': int,
+            'view_count': int,
+            'like_count': int,
+            'age_limit': 0,
+            'duration': 193,
+            'thumbnail': 'https://i.ytimg.com/vi_webp/_A9KsMbWh4E/maxresdefault.webp',
+            'categories': ['Music'],
+            'tags': [],
+            'creators': ['RK Music', 'HACHI', '焔魔るり CH. / Ruri Enma', '瀬戸乃とと', '水瀬 凪/MINASE Nagi'],
+            'timestamp': 1761908406,
+            'upload_date': '20251031',
+            'release_timestamp': 1761908406,
+            'release_date': '20251031',
+            'playable_in_embed': True,
+            'availability': 'public',
+            'live_status': 'not_live',
+        },
+        'params': {'skip_download': True},
     }]
     _WEBPAGE_TESTS = [{
         # <object>
@@ -4166,9 +4230,15 @@ def process_language(container, base_url, lang_code, sub_name, client_name, quer
         vsir = get_first(contents, 'videoSecondaryInfoRenderer')
         if vsir:
             vor = traverse_obj(vsir, ('owner', 'videoOwnerRenderer'))
+            collaborators = traverse_obj(vor, (
+                'attributedTitle', 'commandRuns', ..., 'onTap', 'innertubeCommand', 'showDialogCommand',
+                'panelLoadingStrategy', 'inlineContent', 'dialogViewModel', 'customContent', 'listViewModel',
+                'listItems', ..., 'listItemViewModel', 'title', 'content', {str}))
             info.update({
-                'channel': self._get_text(vor, 'title'),
-                'channel_follower_count': self._get_count(vor, 'subscriberCountText')})
+                'channel': self._get_text(vor, 'title') or (collaborators[0] if collaborators else None),
+                'channel_follower_count': self._get_count(vor, 'subscriberCountText'),
+                'creators': collaborators if collaborators else None,
+            })
 
             if not channel_handle:
                 channel_handle = self.handle_from_url(