Well, between the expert editing, multiple camera angles, big cocks and perfect bodies in today's hardcore clip, we'd be surprised if this were really an amateur affair. But we can't see any faces or logos, so who cares?
Legality on Xtube is pretty confusing. There are loads of promotional videos, but half the time you can't tell what's being sold and what's being stolen. Sometimes it's best to simply try not to think about it and sit back and enjoy, especially when the guys are this hot.