Well, this is pretty rad. TrueTube is a web project designed by the mad scientists at FourClops in which you can mash up YouTube videos with 10 tracks from Avicii's album True. You can sync up the songs to whatever videos your twisted little mind might find in the depths of YouTube. As you can imagine, there are all sorts of ridiculous, hilarious and often great mashups. Here are some examples:
Try it out for yourself at TrueTube. Have fun, young Scorsese.