[VK] Fix playlist URLs (#4930)

Closes #2825
Authored by: the-marenga

yt_dlp/extractor/vk.py

@@ -536,7 +536,7 @@ class VKIE(VKBaseIE):
 class VKUserVideosIE(VKBaseIE):
     IE_NAME = 'vk:uservideos'
     IE_DESC = "VK - User's Videos"
-    _VALID_URL = r'https?://(?:(?:m|new)\.)?vk\.com/video/@(?P<id>[^?$#/&]+)(?!\?.*\bz=video)(?:[/?#&](?:.*?\bsection=(?P<section>\w+))?|$)'
+    _VALID_URL = r'https?://(?:(?:m|new)\.)?vk\.com/video/(?:playlist/)?(?P<id>[^?$#/&]+)(?!\?.*\bz=video)(?:[/?#&](?:.*?\bsection=(?P<section>\w+))?|$)'
     _TEMPLATE_URL = 'https://vk.com/videos'
     _TESTS = [{
         'url': 'https://vk.com/video/@mobidevices',
@@ -550,6 +550,13 @@ class VKUserVideosIE(VKBaseIE):
             'id': '-17892518_uploaded',
         },
         'playlist_mincount': 182,
+    }, {
+        'url': 'https://vk.com/video/playlist/-174476437_2',
+        'info_dict': {
+            'id': '-174476437_2',
+            'title': 'Анонсы'
+        },
+        'playlist_mincount': 108,
     }]
     _VIDEO = collections.namedtuple('Video', ['owner_id', 'id'])
 
@@ -584,11 +591,19 @@ class VKUserVideosIE(VKBaseIE):
     def _real_extract(self, url):
         u_id, section = self._match_valid_url(url).groups()
         webpage = self._download_webpage(url, u_id)
+
+        if u_id.startswith('@'):
             page_id = self._search_regex(r'data-owner-id\s?=\s?"([^"]+)"', webpage, 'page_id')
+        elif '_' in u_id:
+            page_id, section = u_id.split('_', 1)
+        else:
+            raise ExtractorError('Invalid URL', expected=True)
+
         if not section:
             section = 'all'
 
-        return self.playlist_result(self._entries(page_id, section), '%s_%s' % (page_id, section))
+        playlist_title = clean_html(get_element_by_class('VideoInfoPanel__title', webpage))
+        return self.playlist_result(self._entries(page_id, section), '%s_%s' % (page_id, section), playlist_title)
 
 
 class VKWallPostIE(VKBaseIE):