I remember seeing some other song here before, so sorry if this is a repost, but here's a funny song http://www.youtube.com/watch?v=KO_ey4v1ccA
I hate the guy who sings it but the lyrics are funny!

Here's another funny video, http://www.youtube.com/watch?v=z6wJK1s6FBs

Some interesting glitches and easter eggs http://www.youtube.com/watch?v=YdKzYWJynQ0

And totally random non related video here, but it's my favourite vid ever http://www.youtube.com/watch?v=el_LVfoDC-I