Suckerpinch barely ever releases a video, but when he does they are great. NaN gates and FlipFlops are my favorite: https://www.youtube.com/watch?v=5TFDG-y-EHs

You can only get good at mathematics by doing, but if there is a channel that helps you get better at math passively it is probably Michael Penns': https://www.youtube.com/@MichaelPennMath