This was made by MikeMov89Portal2 for a youtube competition for a Portal 2 Music video by Valve. He didn´t win, but I think he made the best music video out of all the entries. Check it out. [ame]http://www.youtube.com/watch?v=reCp31Mj2G0&feature=channel_video_title[/ame]
This one won, I think he wasn´t nearly any where near as good, but hey. http://www.youtube.com/watch?feature=player_embedded&v=M4X6q7rKGd0