'Between the Folds' is a short documentary about Origami, and it quite literally one of my favorite documentaries of all time.
So much of what these artists discuss traverse their genre, and are universal principles of art that we all can relate to. Some of the discussion is even surprisingly analogous to digital art vs. traditional art. Please give it watch, I think mosts visual artist will find it really enlightening.
Yes, I know this video may not be completely legal, but for the sake of educational purposes, I couldn't help but share it anyways.
If it's an option for you, I would highly recommend watching it in HD from a more reputable source like Netflix. It is worth it.