What topics aren't well enough covered on YouTube?

How the Internet actually works from the ground-up.

There are lots of videos that stop once they get to the IP/network layer.

There is very little content that goes further down the stack than this and talks about the backbone, transit, routing, BGP, autonomous systems, etc.

Philosophy for kids.

Step by step take down of startups(in terms of Porter's strategy diagrams). All you have on youtube is rehashing of stuff most of us already know.