The Beatles: Get Back

Yes... this footage shows that the Beatles were still a group that enjoyed each other's company and playing together at this late time in their career during the recording sessions for Let It Be. Several critics have suggested that looking at this footage they get the feeling that the 1970 film Let it Be was a hatchet job. McCartney mentioned in a documentary that he always remembered the Beatles having fun working and creating together... but the Let It Be suggested that the final years were all bickering and fighting which was not how he remembered the era at all.
I recently read the Glyn Johns book 'Sound Man'. He worked with the Beatles quite a bit.

I think he is in the clip attached.