Think of a subtle combination of The Producers, Waiting for Guffman, Altman's The Player, Lost in La Mancha, and your standard "Making of" featurette and you'll be about half-way there. I know there are things I didn't catch because I'm not nearly obsessive enough about film, or even further, Cinema (thunderous chord).
I hadn't heard about it other than the title before Kirsti suggested it, and had she not I would quite likely have given it a miss. So this is somewhat in the way of a public service announcement in case other folks who might get a kick out of it might be prone to pass it by. [In Seattle, it's showing at the Guild 45th, for the moment.]