I watch a lot of math related YouTube content because I'm a fucking weirdo, and I was surprised to see there weren't threads on these guys. Here are some of my personal favorites.
3Blue1Brown
Numberphile
Mathologer
Flammable Maths (He's a sperg but I enjoy him)
3Blue1Brown
Numberphile
Mathologer
Flammable Maths (He's a sperg but I enjoy him)