Hardly it almost always a shortened more approachable summary of something described in a book. Also (IMHO) videos are a horrible format for transferring knowledge, it’s slow AF compared to reading and impossible to search, you have to consume it mostly sequentially
Sure, you could buy a book about snes (not even sure if any good ones exist) and read about that... but you're not that interested into the topic, because it's something old and not something you'll actually do... but here's a 6 minute video, that you'll probably watch... and if it's interesting, you'll go down a playlist and see "how thing were done" "back then" and learn something new.
Ever heard of Tefifon music player? Neither have I, until i saw the video: https://www.youtube.com/watch?v=yqfVS6ahArs ... i would have never bought a book on ancient music players, but I learned something new by watching a short video.
Ever heard of purple gold? Neither have I, again, until the video: https://www.youtube.com/watch?v=d6Pcp944sRI
Compare this to eg. book bestsellers: https://www.nytimes.com/books/best-sellers/combined-print-an...
Sometimes all you need is a summary, you're not a chemist, SNES programmer or an old music player collector, but you still learn a lot, and all those things are topics, where you just don't buy a book, because th 10, 20 minute video covers all that you need and want to know.