I do wonder how much of video's proliferation is because we (in the US at least) fucked up teaching a generation of kids how to read. I'm told one of the dominant strategies for teaching reading was just bad. Well meaning people went all in on it, and then kids just didn't learn to read well.
You can read about it here, or listen to it as a podcast https://features.apmreports.org/sold-a-story/