Thought this was really well explained... and super interesting.
The world's worst video card?
By Ben Eater
https://youtu.be/l7rce6IQDWs
His vid playlist is also worth a look, if you're into this kind of thing! ;)
https://www.youtube.com/c/BenEater/videos
I've learned a LOT about the inner workings of the Internet from Ben's videos. :D