4’33” again and again

A video of David Tudor himself performing 4:33, most likely recorded for a Japanese TV station.

The funniest thing is the overlay message:

You are invited to turn down the volume on your TV set and listen to the ambient sounds present wherever this program is performed.

It's unclear why you would turn down the volume on your TV if the song is silent, as if any sounds broadcast by the set weren't worth listening to.