Hello Great holders of the priceless

I was reading an interview with Al Kooper who was talking about the Fillmore East and specifically he states that all the shows were filmed from the orchestra seating in black and white. I believe the quote is on the Fillmore East site.

My question is just if the above comment is perhaps valid even true. Can you tell me if there is a full live filmed performance of Janis Joplin with Big Brother and the Holding Company or with her other 2 bands in existence.? Just knowing that there is real  footage would be such  validating info for her true fans that long so for more live  filmed performances as there just haven't been that many that have surfaced but I believe there must be more in existence.

If you could just answer the question of BG existence filmed Janis footage that would really mean so much to me and her Nation!!!

Thanks so much