I have only a vague description to offer, but here goes. Several years ago, MisCon received an entry to our Short Film Festival. It was in the horror category though I don't remember whether or not it was Cthulhu-related. It was animated, took place in a basement and I believe the guy in it kept coming down several times.
Yeah, that's my description. It was great and I'd love to find it. Any thoughts?