I just got word that a UK professor was going to show these movies to her hyperbolic geometry class today, as a treat for the last class of the term.
Reminds me of when I was in public school and we got ice cream on the last day of school.
In another day and age, they would have been asked to get out their rulers and compasses and draw the thing, as shown here. Up until recently, that’s representative of the best depiction mathematicians had.
The movie that corresponds to it is here.
reminds me of my old spirograph set!