Should the lectures and videos be the same? Like should the contents of the 2015 Lecture Week 2 (1st one) be the same as the 2016 Lecture Week 2 continuted? I hope I don't have to rewatch all of them!
Probably not. I am rewatching them, but I got distracted by real life and other things after a couple of lectures, but if you're farther in I would think it's not necessary. They're always there if you need them while you work through the psets, so I wouldn't take the time if you didn't think you needed them. Good luck!