> Perhaps if you can't appreciate a mathematical subject as it is presented in its dry text form, then it isn't something you are likely to ever understand
I dunno. I find animations of mathematical concepts to be quite effective in communicating the intuition behind them, much better than text.
Perhaps, you just haven't seen good use of multimedia.
> I think one of the problems with the video format is that it entices you into being passive
I prefer videos over lectures. The reason is that I can pause them, replay them, for technical stuff, try things out.
You might say: Well, you can do that with a book. For me, the lecture uses a more approachable language than the more formal format of the book (good for further exploration and lookups). A video demonstration is just more compact and more effective because it is multi-modal, than the full description in text.
> because the three forms crowd each other out.
In a well-done presentation, they are complementary... multi-modal.