I just went through the first 3 videos on VC but I found it curious that there was no mention of participation rights (1x, 1.5x etc.) and their effect on the outcome for founders. It is such an important concept that leaving it out of the video is a significant strike against. I like Sal's stuff generally, but I would vote this particular video down if I could (for the reasons mentioned above).
Didn't expect that there would be notes on VC's on Khan Academy :)
Sal used to work for a VC firm (MVC Capital) before he started Khan's Academy.