I'm currently learning electronics, as well as having just recently sat my Physics/Math finals. I can tell you with 100% certainty you CAN'T learn shit from /just/ video.

Actual learning requires you to think about what you just read, maybe re-read it multiple times, stop to try and solve a example problem, etc - all of which require you to stop/rewind which video inherently disfavors.

Besides, I think just like handwritten notes might have a slightly different neurological effect than typed ones, reading might just be a very different mental muscle more connected to comprehension; humans had oral language for much longer than any script, so maybe it came with some different connections to higher brain structures as well.

The only thing you’re saying with “certainty” is that you personally cannot learn only from video. Anything else is pure hubris.