Watch his performance and take the perspective of the performer or of a performance viewer. There are some interesting characters who pass by in this video.
Or perhaps your story is of an outsider, who stumbles on this performance and maybe the story isn't about the performance, but about the experience of watching those who are watching the performance. Or not watching but wander by and wonder.
Let yourself sink into the video and then write. For 8-10 minutes.
Go.
