Youtube has more signals. You have upvote/downvote. All videos belong to channels which have sub counts. There's also comments. In other words, it's a lot eas

Youtube has more signals. You have upvote/downvote. All videos belong to channels which have sub counts. There's also comments. In other words, it's a lot easier on youtube to tell if a video is likely crap or not and weigh it accordingly.