Many channels I watch have already been mentioned, but one comes to mind that hasn’t been: if you like Stuff Made Here and NileRed, you’ll love The Thought Emporium. Dude is a mad scientist, for real. His current long term project is trying to make a neural net that can play DOOM… except he means real neurons. Biological neurons grown in his self built lab, sourced from rats.
Check out Quill18’s preview using the same footage but talking about what it means at every point, having actually played it: https://youtube.com/playlist?list=PLs3acGYgI1-tzagcKgi6fNTFoBRZfOWVE&si=pCH-r1x7w6ho0tPu
A few other YouTubers have done similarly.