SCPM: I hadn't been keeping close track, but it looks like more movies were removed from sale? It's down to just 15 entries now.
I did a little research, and these are the movies removed on a date somewhere between November 10 and 22, 2021:
Angry Video Game Nerd: The Movie
Austin High
Burning Man: Beyond Black Rock
Mars
Motivational Growth
One Couch at a Time
Pixel Poetry Special Edition
Stream Dream
Super Game Jam - 5 Short Films & 5 Short Games
The Art of Playing (Free)
The Basement
They were all published by Devolver Digital, and I can't find much information about their movie division anymore, so maybe it closed, or their distribution rights have ceased. I kind of regret not picking them up when there was one of those super sales on their movies.