This thread needs to get longer. I'll throw in some I've liked enough to keep. Recording from TV is my main source for documentaries.
Classic Albums -series.
Anvil! The Story of Anvil
Exit Through the Gift Shop
Martin Scorseses "The Blues"-series
The Woodstock Diary
The Yes Men Fix The World
Hammer & Tickle: The Communist Joke Book
Gonzo: The Life and Work of Dr. Hunter S. Thompson
Anyone seen The Decline of Western Civilization? I've been waiting for this to come out on DVD or BD but is doesn't seem to happen.
EDIT: Got to add New York Doll.
For me this was one of those "You could't make this stuff up"-moments.