Ben Eater has some interesting video series, including building a cpu from logic chips, building a 6502 computer on a breadboard, building a vga card, and details on usb, ps/2, ethernet, &c.
Yeah, he's really great. I have been searching for more channels like his, but couldn't find anything sadly. Closest I found was nandland, but he's more focused on digital design.
https://m.youtube.com/c/BenEater