> That people like video formats isn't really surprising to me since it's everywhere, but I still don't fully understand the appeal.
Me either, but I have a hunch about why.
Are you a fast reader?
I am, at least compared to the population at large. And one of the reasons I can't stand video as a format for learning about coding topics is that it is so frustratingly slow compared to my reading speed. To get anywhere close, I have to crank the playback speed up so high that I start having trouble understanding what the presenter is saying. That's on top of other things like poor searchability and no way to copy-paste code snippets.
The decline of reading skills, at least in the US, is pretty well-documented. And my hunch is that for the increasingly large number of people coming into the industry who don't read quickly or well, the efficiency of learning from videos is closer to parity with text. What's more, I suspect there's high correlation between lower reading skills and dislike of the act of reading, so videos are a way to avoid having to do something unpleasant.
I have no solid evidence to back any of this up, but it seems at least as plausible to me as any other explanations I've run across.