And it really can be fascinating.
Here is The Man himself, Picasso, performing on camera for us in Henri-Georges Clouzot's La Mystere Picasso from 1955.
In this scene, Clouzot informs Picasso that he only has a few minutes of color film left, and Picasso with perfect sang froid assures him "sa va."
Here's one of my favorite paintings Picasso made for the film:
I don't know about you, but I think he destroyed it in the end. The finished picture is not nearly as compelling as some of the stages it went through.