IMDB lists the author as Ronald Baecker. Wikipedia says he's a tenured Comp Sci professor at the University of Toronto.
The publication info there
Baecker, R.M., with the assistance of Dave Sherman, Sorting out Sorting, 30 minute color sound film, Dynamic Graphics Project, University of Toronto, 1981. (Excerpted and “reprinted” in SIGGRAPH Video Review 7, 1983.) (Distributed by Morgan Kaufmann, Publishers.)
I dug around on the University of Toronto website and found his page
I suggest contacting him directly, everyone always loves to hear how their work has influenced future generations!
I also found in the references:
The half hour film — Sorting Out Sorting, one of the first profound demonstrations of the potential of computer animation to portray and elucidate computer program behaviour (publications B7, C13, D3, D4, G2, J5, K2).
G2 links to a Quicktime (.mov) file version:
http://past.kmdi.utoronto.ca/rmb/video/sos_recap.mov (summary speed x 12)
http://past.kmdi.utoronto.ca/rmb/video/sos_dotclouds.mov (last scene)