when you prepare a 35mm projector to play a movie it’s referred to as “threading” the projector.
this video was filmed the last time I threaded a 35mm projector before the theatre switched to digital projection (don’t worry though, the 35mm is still there and operational).

filmed, directed, edited, music by, graphics by, and starting – Adam Pyburn (me)

[Featured on the Film Babble Blog]