Somebody has done the world an enormous disservice of uploading the entire film of Paper Mask to YouTube, exactly as I feared somebody would. It's obviously in the public domain now. I was hoping it had vanished forever, but it's popped up again like a bad smell,
See here for the film: https://www.youtube.com/watch?v=Y9LVW7N-v80.
The film tells the story of a hospital porter who steals the identity of a dead doctor and impersonates him. I'm only posting a link because some people are curious to watch it. If you choose to click it, don't blame me afterwards!
See here for background: http://hpanwo-hpwa.blogspot.co.uk/2012/11/paper-mask-online.html.