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.

Somewhat related, I became mildly interested in telecommunications networks work including infrastructure, protocols, etc., but had issues finding stuff that gave more a very basic overview. This may have been my fault, for not knowing exactly what to look for, but I feel like a lot of knowledge gets locked behind a gate that only working in the respective domains can unlock.

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.