I thought at first that the “fingers’ were controlled by a computer, but this is actually an animated video.
It was produced by a company called Animusic. The company is known for its Animusic compilations of computer-generated animations, based on MIDI events processed to simultaneously drive the music and on-screen action, leading to and corresponding to every sound. Unlike many other music visualizations, the music drives the animation. While other productions may animate figures or characters to the music, the animated models in Animusic are created first, and are then programmed to follow what the music instructs them to do.
If you understand all that, you’re smarter than I am.