[youtube] Support expanding alternative format of links in description (Closes #8164)

youtube_dl/extractor/youtube.py

@@ -1235,10 +1235,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             video_description = re.sub(r'''(?x)
                 <a\s+
                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
-                    title="([^"]+)"\s+
+                    (?:title|href)="([^"]+)"\s+
                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
-                    class="yt-uix-redirect-link"\s*>
+                    class="(?:yt-uix-redirect-link|yt-uix-sessionlink[^"]*)".*?>
-                [^<]+
+                [^<]+\.{3}\s*
                 </a>
             ''', r'\1', video_description)
             video_description = clean_html(video_description)