Saw this new App released yesterday, which I've seen no other App do this yet and that's the ability to play 2 short videos simultaneously next to each other from either your iPhone/iPad library and/or YouTube. DuoVid seems cool, on their Youtube video it talks about using it for learning new tricks, learn a new recipe, learn a new instrument, compose a song etc.
Their weblink is here also. http://www.PitchanApp.com/DuoVid
Their weblink is here also. http://www.PitchanApp.com/DuoVid