That is indeed the most out-of-sync audio/video I've ever seen! As in about 25 seconds out-of-whack (if it is even the correct audio).
I might be mistaken, but Jerry looked slightly high. Likewise the little kid, halfway through the clip.
And LOL at Bill Kreutzmann's preppy button-down collared shirt . . . maybe he wore it because they were performing at an Ivy League school? :lemo: