I'm a fan of and advocate for Super8. I still own 5 Super8 cameras
and still shoot film sometimes. I've participated in several of those
one cartridge challenges over the years. There was a twice yearly
one in Santa Monica California in the 80's that I did. We would shoot,
then drop off the cartridge. They would process it and the film would
be projected at a theater a week later.
Look like what you folks are doing on a bigger scale. I love it!