An Hour With Pink Floyd
From the official Pink Floyd Youtube page:
“‘An Hour with Pink Floyd: KQED’ sees the band filmed performing live in April 1970 by San Francisco cable TV station KQED. Taken from the version featured on 2016 ‘The Early Years 1965-1972’ box set, the film includes performances of Atom Heart Mother, Cymbaline, Grantchester Meadows, Green is the Colour and Careful with that Axe Eugene. Appearing as part of the @YouTube Film Festival until May 17th.