I lived in the Farm around 2005 and stumbled across this clip while trying to learn more about it. After a fair bit of legwork I was able to acquire the full documentary by contacting one of the makers directly. Since he posted his email in a public posting for a showing at the Roxie, I'll presume it's okay to repost his address here:
Mike Kavanagh
agitspin@
riseup.net
He was willing to make me a VHS copy of the documentary, though it seems like he must have to make them one at a time... Oh, and as for whether it's any good or not, definitely so -- not only is it the best if not only video resource that details the rise and fall of The Farm, but it's fairly well edited (for being 15+ years old) and a good watch overall.