I've always enjoyed watching The Art of Code[1], Freya[2] also has a good number of videos on it.

But that is just vertex shaders for things like Shadertoys.

There is much more to computer graphics or GPGPU than this though, Im still learning about that myself X).

[1] https://www.youtube.com/watch?v=eKtsY7hYTPg [2]https://www.youtube.com/watch?v=kfM-yu0iQBk