Haha, nice! I never even thought to use youtube for math help.
I saw this guy's video on The Fundamental Theorem of Calculus (Part 1) ... what I usually call "the second fundamental theorem of calculus" , and thought it was good. Another thing is that he moves very slowly, so if you are not that quick with math, that's no problem. there are a lot of other nice math videos on youtube, but a lot of the time, the guys talk fast and move fast. this has a nice, slow pace. so without further delay:
also check out his youtube page, which has the same videos it seems, the website links to youtube