Well, keep in mind there are 2 trailer types, one that is shown only for non subscribers and the other one for current subscribers. So I don't think there's anything pushy about them, plus they are only shown when they view your home channel page and at that point it's a good thing the non sub trailer plays automatically because it's a great opportunity to get a new sub which accents just how important the trailer is, especially the first few seconds or so. For current subs seems like most channels either play their most popular video or their latest video.