This post has generated amazing comments (except the Skibidi one). Thank you everyone for the suggestions, every one is now part of my feed (except the Skibidi one).
Haven’t seen this one in this thread: Joe Scott / Answers with Joe.
I like watching OddTinkering. They take broken stuff and refurbish it in ASMR style. Very satisfying to watch.
Bro, vsauce?
How To Basic
Bill Hammack (engineerguy) - Engineering inventions and items explained. All videos are CC-BY-SA.
https://engineerguy.com/videos.htm
Others
Mend It Mark - fixing electronic items
Photonic Induction - Blowing up electronic items
decino - Doom videogame inner workings