I think I've only seen 2 or 3 of there, but y'know interesting list. And we love lists.

http://stereogum.com/1155172/the-10-best-indie-rock-documentaries/franchises/listomania/

I never even thought of 1991 as a documentary, but then I lent out my VHS copy long ago never to see it again so I can only remember the odd thing in it.