I think the videos exist because people think that's how they can get paid for their documentary work. If you add documentation to an open source project, they strip your name off and a bunch of randos edit your work to the point of unrecognizability. If you document something on your blog or website, you have to pay to host it. If you document something in the form of a YouTube video, the hosting is free, and you can click a button to have a penny deposited in your bank account every time someone clicks it. You can even do your own side deal and insert an ad wherever you want! That's why everything is a video these days, it's simple economics.

Certainly, there is still a lot of text in the world, but the reason things are moving towards videos is exactly because C-f doesn't work. You'll click a video hoping it will help, it won't, but the advertiser will still pay the content creator. If you visit a text-based website, search for what you're looking for, and don't find it, you'll be gone before the ads even load. And that was in a world where advertisers paid for text ads, which isn't the current world.