1977 tour footage

I recently purchased a DVD that has 65 miinutes of 8mm footage from the 77 "Animals" tour. I've read about some of this footage existing, but never this much.
It's a little rough quality wise, but considering the year, it's to be expected. None of the songs are complete however, which is a bummer. Some only last a few seconds. I was just curious if anybody knew much about this footage? Does more exist? Does a whole concert exist? I did a search of other threads on the forum and in one someone mentioned he met an old guy who had a box of unknown footage? Did anything come of this?
I also found a short clip of "Pigs" on kazaa which looked similiar to what I have, but isn't on the disc I bought. I'm hoping there's more out there...