This one is my favorite: http://www.youtube.com/watch?v=r80dqOAlNHkYes, I'm serious. I can't find any of my favorite ones because my mind is flooded with videos I recently watched. :(
http://www.youtube.com/watch?v=hqIsc8ooXug
Porcupine, eating a carrot. Porcupine, eating a carrot. Lady gives him a carrot. Then he sees: "A nom a nom nom nom"
That song is terrible, because that is the whole song repeated.