This was a pretty bare-bones production. I used some test tubes from a chemistry set I had received a Christmas or two prior. The transformation into Hyde was accomplished with some makeup from a kit I'd bought (the kit is visible on the couch as the camera pans to the floor). The special effect, where the camera is stopped and then restarted after the change is made, did not come out as well as I had planned (I supposed my dad jarred the tripod slightly between shots). And my sister appears briefly as Dr. Jekyll's girlfriend.
The highlight of the video is probably my choice of music (which I dubbed myself): the first movement of Beethoven's 5th for the Dr. Jekyll scene, and some organ music (from a Halloween sound effects tape) for Mr. Hyde's scene.
I made this video on 27 September 1987.
[Update 10/25/2023: The makeup kit mentioned above was called the Create-A-Face Complete Makeup Kit, manufactured by Imagineering Inc. in 1985. And thanks to an anonymous commenter from 2012, I learned that my long-lost sound effects tape was titled "Horror Sounds of the Night" and manufactured in 1986.]