There's so many, so I'll have to think about it before answering. I just saw one, a guy who isn't my favorite director, but it was still good (Sam Peckinpah: Man of Iron).
Here's a few..
John Cassavetes - A Constant Forge, I'm Almost Not Crazy
Stanley Kubrick - A Life In Pictures
Orson Welles - Making of "The Trial" (talks a lot about other things)
Here's a few..
John Cassavetes - A Constant Forge, I'm Almost Not Crazy
Stanley Kubrick - A Life In Pictures
Orson Welles - Making of "The Trial" (talks a lot about other things)