If there's something that I really really like YouTube for, it would be the videos showing you how to fix or build things. Good woodworking, metalworking, electronics repair videos are hard to find, but I remember seeing a few that were much better than a manual. The manual typically shows one view of a project or workpiece, but good videos show multiple views, close ups, pictures of different configurations I might expect.

You do typically have to wade through a lot of crappy "Hey Guys Like and Subscribe!" garbage with 30 second title sequences to find the good ones though.