This has been lying around forever. It was originally part of the material distributed with the "Leftbankeisms" torrents, but was embargoed prior to their compilation for unspecified reasons. It's not amazing stuff, in all honesty.
This is reunion material, and based on the general quality and the selections employed, a guess that portions are rehearsals for the "Airborne" released included in Leftbankeisms Vol. 2. In other words, this is NOT 1960s vintage by a long shot.