Only watched 1 second of it. It loks like the clip from the Smothers Bros where Moon put a charge in his drums. Then he doubled it and at the end blew it up causing deafness. I remember watching this when it was first aired back in the 70s.
Yup that's the one, great clip

But it also shows clearly how Entwistle masters the bass, playing the little solo in My Generation. As if he did it since a was a baby.