I don't know. It sounds like they watched it just enough times. This is one of those projects that an artist can do just once but the act of doing it itself is the art.
This is really interesting machine. It mekes me think about the "culte des livres" (French translation from Spanish) written by Luis Borges. The closest mechanical sculpture I remember was exposed at the Reina Sofia museum and was a glorified infinite monkey theorem sculpture (can't remember the name).
https://unsongbook.com/