Adventures in Telezonia was the short educational film they had shown at the RiffTrax Live The Giant Spider Invasion event last year.
I had recently come across the unedited original version of the film on YouTube: https://youtu.be/m4-LcuXOU6E
Complete with this gem.
(https://i.imgur.com/6hxiyxt.png)
I sooo wish they had left that part in just to hear the riffs that would have resulted.