Some kind of 8mm film. It turned out to be too retro, the projector had not been run in over a decade and the feeder sprocket wasn't turning. Someone will have to take it apart to see what's wrong. Back in the 80s I was the go-to guy for the AV equipment in middle school, to the point where I would be summoned out of my class to go and whack a misbehaving projector for other teachers.
