There were two versions of this film from 1965, made by A. Michael Noll. One was a 3D stereographic version (much like his film Hypercube); the other, this version, was a standard one-shot film (no split screen). The original film was silent.
While "Ballet" moves figures around a virtual stage, it is not a form of dance notation; it would be another 16 years before choreography became computerized, by Eddie Dombrower, with his 1981 DOM system. Later, motion capture systems developed for video games and film.
Some of the same footage from "Ballet" was used next to the end credits of the Bell System film, Incredible Machine, in which Noll also appears.
Noll's own site has a wealth of great information about his works and fields of study.
Footage Courtesy of AT&T Archives and History Center, Warren, NJ