This looks like a nice project to try. Compound pendulums and clocks. What a great idea!
It is so smooth that it’s a bit uncanny.
It looks so small and the hands are so smooth. I took it up with some of my friends. I even got a comment that it might be an animation and not a real video.
4h later: I have a theory that it’s larger than I initially thought. Check out this other piece. There is something similar in the background. I sent a note to the artist to talk about it. I hope he answers back. It turns out I’ve been enjoying some of his other work in youtube.