In 1999, when Experience Hendrix (the family company that now controls Jimi's legacy) released the DVD entitled 'Jimi Hendrix Live at Woodstock,' they claimed that the contents of that DVD was all that remained of one of the most important musical historical documents of all time.
Woodstock was a cultural moment, and Jimi Hendrix played the most important role of that moment. EH claimed that the unused footage was thrown out. I said at the time that it was untrue, as that wasn't the type of thing that anyone would have thrown out.
Happily, about that I was correct, because in the 2-DVD set entitled 'JImi Hendrix Live at Woodstock,' all of the remaining unused footage has now been released, and incorporated into the pre-existing footage.