One Direction “Best Song Ever” Video Bonus Footage? [VIDEO]

If you haven't seen this video from Harry and rest of the boys you are missing out.  One of them even makes a very convincing girl.  I am hoping for some behind the scenes bonus footage for the making of the video.  Looks like that had lots of fun making the video!  Does anyone know which one is playing what looks like Tom Cruise's character from Tropic Thunder?   This video is breaking all kinds of records on Vevo for most views.