When I was a kid, I didn't get Miles, Monk or Mingus or Billie Holliday. Later years I did. So if you are looking for a harder clip - during the take over of Columbia University by those ragamuffin Students for Democratic Society in '68, the band was spirited onto campus in the back of a bread truck for an impromptu pirate show as it were. Again, nice historic document. And they are kicking it. Not bad for a banjo whiz and Advant Garde Berio student composer, in the 81 yr old Philip Chapman Lesh.
https://www.youtube.com/watch?v=zq8sp6WF3bQ