Have you ever come across some topic of history or biology that just seemed soo boring at the time it was taught in school. But only years later watching some random YouTube video explaining it and now you realise how interesting it has always been.
I do know YouTube-based learning has it's flaws, but I find it much more enjoyable to engage with vs. the 9-5 teachers/professors I had growing up. The YouTube essayists are often way more passionate and informed on their topics as well.
Then you get the value of a community coming along for the ride... In school there wasn't a comments section where discourse can happen regarding the subject being discussed/instruction. I get that YouTube comments are often horrible, but for many of the educational stuff I've watched good/insightful/corrective comments do seem to trickle to the top.
Also - there's the "my time" aspect of it. This is _huge_ in comparison to normal education. I can move the slider back and listen to a part over and over again - sometimes topics are tough for me and I need to hear it 3-4 times. I can put the video on 1.25/1.5x if I want to bump the pacing up. I can study/learn when I personally learn best which tends to be late at night.
Finally there's the technical aspect of it. I didn't go to a nice college - I went to a very expensive private school in the midwest. I went for both design and computer science. With 100% confidence I can say that every topic that I studied from math, to programming, to electronics, to art history, Adobe Suite... _all_ of it has more up-to-date and functionally better instruction on YouTube available 100% for free. This sounds like an exaggeration - I promise you it is not.
Yes - YouTube learning has it's problems... but anecdotally I have learned so much. I have saved money fixing my own cars. I have jumped into topics that would have _never_ interested me before. I have improved skills professionally. It's a resource that I now can't imagine going without!