I don't understand the use of video to teach many things. Particularly when it's not just a "Building this together" tutorial, it's a "teaching core concepts" v

I don't understand the use of video to teach many things. Particularly when it's not just a "Building this together" tutorial, it's a "teaching core concepts" video. You can't go back and forth on a video without quickly skipping through it, you really have to watch the whole thing. And listening to human speech is much slower than reading. I understand it for some things (Gaming, DIY, etc) but not teaching thinking subjects.