This is the best documentary I've ever seen.* It's about Canadian animator Ryan Larkin, and the film is directed by Chris Landreth, who conducts the interview.
What makes this documentary rise above the mundane is that Landreth is an animator, and he has produced a film that is an animation based on actual footage. Landreth makes the animation tell more about Larkin and himself than mere documentary footage. "Ryan" tells us about both the interviewer and the interviewee. "Ryan" is monumentally touching and moving.
Landreth's use of animation to show the inner beings of his subject and himself is a tour de force that leaps head and shoulders above the genre.
*It's a tie for best with "Seven Dumpsters and a Corpse."