At some time in the video he's casually played a groove on the piano to back the birds for a couple of second, then stopped ("Wait, what am I doing") :)
You can also see his modular setup in the background.
I didn't know of him until today. Instantly, a new inspiration.
If you watch some of the other vids it does a perfect r2d2 impression, don't recall if it did it in Benn's.