I just bought an iPad (w/ ios 6) and am playing w/ itunes U, and am completely baffled by the interface. So I have some courseware in my libarary, and each of those has some lectures. I want to download some videos that I can watch on a plane, when I'm not connected. When I see a vidwo, I can click a checkbox next to it, but as far as I can tell that does absolutely nothing. Then I can click the little download arrow which seems to prepare to download the video. Great. But then, where is the downloaded video? How do I see the list of videos I've downloaded?