I'm more likely to finish a few chapters of a textbook than a series of videos: 1. Videos are usually too long. There isn't a natural break to stop and try thi

I'm more likely to finish a few chapters of a textbook than a series of videos: 1. Videos are usually too long. There isn't a natural break to stop and try things out. (Udacity does a good job with this one.) 2. Information density isn't constant. With text, this isn't an issue: I naturally adjust my reading speed if I hit a sparse or dense area. With video, I have to either live with it or constantly re-adjust the video speed.