Of course they're not, but OP kind of implied that it wasn't necessary to read a lot of pages of mathematics when he said
> you can't sit thru lots of pages of mathematics text
Even if you watch those videos, you still need to sit through lots of pages of mathematics if you want to master the subject.
These things aren't mutually exclusive. I don't know about anybody else, but I'd rather watch a video of a human explaining the subject, then sit down with a textbook and start working through problems.