David Holzman’s Diary

I never knew of the existence of this film until reading the obituary of one of its creators, L. M. Kit Carson. As an ancestor of Spinal Tap and others of that ilk, it should appeal to WU-vies, I think.

Unfortunately, the entire video does not seem available online. There's a snippet above, and a mini-documentary about the documentary in two parts below. (Caution: brief flash of modest nudity in part two.) You can buy the disc or stream it at Amazon.