A friend sent this to me recently, I thought it was the perfect combination of the last blog on remix and fair use and the last essay on the Star Wars Holiday Special.  My main motivation for posting is to share such an applicable video merely for enjoyments sake, but if people want, perhaps they can argue fair use of this video in comments.  I think this most apparently falls under fair use because as a parody it completely repurposes the original song with new lyrics.  One could argue though that the format of the video does not fall under fair use, as it implements the exact same artistic vision of the original video.