Nah, unfortunately I watched this video a couple weeks ago and while it is a waste of time, there is at least a bit more to it than that. DNS is part of it but it’s more “I built a regular router”. The backstory is the OP’s apartment has some kind of shady wireless ISP as their only option. They build a router to hide connecting multiple devices behind NAT (which they barely even talk about), but they don’t do much else to actually hide devices. Honestly it’s really basic and could be achieved with a cheap travel router, though the 3D printed enclosure they built is pretty cool.

Even if you’re not a Linux networking neckbeard and want to learn this video isn’t worth watching because it just glosses over the actual useful/interesting/complicated parts.

DNS over TLS?

Given that it’s a YT video, I’m assuming it’s trash content anyway.