Same here. I think this is a great opportunity and many of us waste it — it's so much easier to post snarky comments on Facebook, after all.

On the practical side, once you download the videos, I can heartily recommend the SwiftPlayer iOS app — it lets you vary the speed at which the videos play, which is very practical for lectures. I watch easier sections (or ones that I just want to repeat) at 1.5-2.0x, going down to 1.25x or 1.0x when things get tougher. Easy FF/RW in 10 or 30-second increments and bookmarking are very useful as well.

I got so used to SwiftPlayer that I can't bear to watch lecture videos in the web browser anymore.