It seems that this band is somewhat legendary. There is a really good extensive interview/article on Dangerous Minds from about 10 years ago, which has some album tracks and a 6 minute video embedded. There are plenty of short videos of the band on youtube, but only one other complete set. So this seems pretty unique.
It looks like this is one angle of a multicamera shoot that has never seen the light of day. The 6 minute live (multicam) clip and the only other complete show seem to be from the same concert at Graystone, and it’s not this one.
I’ll link the dangerous minds article in the facebook comments, it’s a good one.

Recorded by: Russ Gibb and Tom Burtell
Transfer by: Shayne Stacy
Equipment used: Sony SL-2100, Datavideo TBC-1000, Tevion adapter- Virtualdub
i probably denoised this in Adobe premiere elements and Neat video