Alternately they've overlay a transparent play button over the entire pay so the moment you click it counts as a "user action" and the video plays. Seen it happ

Alternately they've overlay a transparent play button over the entire pay so the moment you click it counts as a "user action" and the video plays. Seen it happen on a few sites. They combine it with something like forbes uses with a "quote of the day" interstitial.