Original Videos:
Friday (original): http://www.youtube.com/watch?v=kfVsfOSbJY0
Friday (cover): http://www.youtube.com/watch?v=0Rv1BZcksIc
Hot Problems (original): http://www.youtube.com/watch?v=__HeE6NWmDE
Hot Problems (cover): http://www.youtube.com/watch?v=X8S0ef_L78A

I don't own any of the video or audio material used in this video. This video was made for teaching purposes only :)