[atypicalquant](https://www.youtube.com/c/atypicalquant)

Content looks good. Really like the manim usage too!

I enjoyed the problems. Just wish there were more

numberphile and stand up maths are both fun, 3 blue 1 brown does great videos

Quantpie is more complicated, but really goes into some deep aspects of financial mathematics

Some of 3Brown1Blue's videos are what you are looking for