After working with math academy, any form of video learning seems so inefficient. I think people lose a lot of time watching these videos thinking that they are learning without applying anything by themselves.
Good point. Learning mostly occurs during the active parts where no YouTube video can provide. I think that's why universities will live a lot longer than people think.
I think this list shows that how overwhelming the amount of resources to learn but we have so limited time. I think Duolingo style learning paths are way to go because we need to minimize the time to learn something. These kind of dumps are of no use except for bookmarking and feeling good.