Mostly I'm putting this up here in case Penn hasn't seen it, but I figure most other people here would enjoy it as well.
It's a magician, performing close magic, for a monkey. Do I really need to add anything to convince you that you must watch it?
It also raises interesting lines of thought about evolution and mental processes, in case you need your monkey videos to be both funny and enlightening.
http://www.youtube.com/watch?v=IM-KQxgtOao
Also, Mofobabe, has P&T considered having a monkey as a volunteer at the Rio show? Seems like a good fit (and they're less likely to witness about Christ as well).