I can't believe no one posted this one. It's one of the most popular and it's definitely the funniest:
Teenage Mutant Hardcore Turtles
http://www.youtube.com/watch?v=SxigNvJxGn4
**Warning: Profanity Laced**
Another Favorite of mine is the "Everyday Life of a Foot Soldier" series. Here's a link to the first video. There's 15 episodes in total. You can find them to the right.
http://www.youtube.com/watch?v=m2L0DkcOhKs