It's a clip from Season 5 of Supernatural. If you haven't seen the episode yet and don't want to be spoiled, don't watch and don't read on.
If you have it, you'll know what its about and the cuteness of it all.
If you don't plan to ever watch the show, you should still check it out. The boys are in a
It really works:
Okay, what's that friggin flapping sound?