Not disputing your sources, but seriously, if it were possible to release this officially I think it would have been done
a long time ago as this is in everyones top 10 of all time. I've had a 100th generation cassette of this for 30 years which
I listened to hundreds of times. One only need watch the video you posted to see what a great day it was.
Think about it how can Rhino release the video if they don't hold the film rights, I fully trust the source. Last year was the 40th Anniversary that would have been nice for timing but it could and should happen eventually because yea it's got to be one of the most requested releases of all times. An audio only release could happen but that would be less than ideal compared to what could be delivered if the rights can ever be secured for the film.
If there was a good copy of this in the vault it would have been released by now. If it were not the property of the Grateful Dead would be the only reason it hadn't.
Considering you're obviously an audiophile, and if you could hear some of the boots I've listened to religiously
over the years might not understand I don't have to have 5.1 or whatever quality. As long as I can hear the five, six, or seven
musicians I'm pretty happy. For me it's always been about understanding what the moment was all about. Btw, when Dick's Picks vol 8 was release it was kind of a let down, because my boot was actually a bit faster, and I realized they were actually playing a bit slower. Funny, huh?