Extreme Tube is supposed to be a place where you're going to see some pretty extreme stuff, but if I'm honest with you, the clips here appear to be pretty standard. Don't get me wrong: there's lots of hardcore sex, barebacking of twinks and daddies dominating, but if you think you're only going to find scenes of a BDSM nature, think again.
Extreme Tube is actually owned and operated by the same studio that has PornHub and a number of other destinations. I don't know why you'd pick this place over Gay Tube (which is also on the same network), but I felt it was worth a mention because they do have a pretty nice design.
Anyway, see if you like it and if not, check out one of the other sites I've got available here for you at My Gay Sites!