Add support for img.youtube.com (old thumbnails)

youtube-extract

@@ -103,7 +103,7 @@ matchers = [
 	[r'/www\.youtube\.com/(?:subscription_center\?(?:\S*&)?add_user=|subscribe_widget\?(?:\S*&)?p=|profile\?(?:\S*&)?user=)([^/=&\s]+)(?=(&|\s|$))', True, lambda m: f'https://www.youtube.com/user/{m[1]}'],
 	[r'/www\.youtube\.com/feeds/videos\.xml\?(?:\S*&)?channel_id=(UC[0-9A-Za-z_-]+)', True, lambda m: f'https://www.youtube.com/channel/{m[1]}'],
 	[r'/www\.youtube\.com(?:/view_play_list\?(?:\S*&)?p=|/playlist\?(?:.*&)?list=)([0-9A-F]{16})(?=(&|\s|$))', True, lambda m: f'https://www.youtube.com/playlist?list=PL{m[1]}'],
-	[r'/i\.ytimg\.com/vi/([0-9A-Za-z_-]{11})/', True, lambda m: f'https://www.youtube.com/watch?v={m[1]}'],
+	[r'/(?i:i\.ytimg\.com|img\.youtube\.com)(?::\d+)?/vi/([0-9A-Za-z_-]{11})/', True, lambda m: f'https://www.youtube.com/watch?v={m[1]}'],
 ]
 
 # Compile pattern and generate one for parameters if desired