Well, guess we should all go buy iOS devices, so we can have a great one-click experience watching lectures produced by public universities that are paid for by taxpayer dollars and ought to be freely accessible.
(Sorry if I'm rubbing it in too hard, you've been very gracious in this discussion.)
However, the end-user experience for downloading videos from iTunesU and playing it on an iOS is excellent. It is almost a one-click experience. This is just my opinion as a user.
I'm curious, on a vanilla iOS device, what application would you use to download a video on a website and have it cache onto your device?
I agree that if you don't have an iOS device, this doesn't work.