I've seen this film a couple of times now. It's a little under 20 minutes long. Called "Doctor Island", it's based on Gene Wolfe's short story "The Death of Doctor Island", which I've read. Both the story and the film are somewhat disturbing.
Aside from that I know very little about it. For example, where was it filmed? It's a memorable location, especially shot in black and white. Probably an island in or off the US, I would guess. The actors haven't been seen much elsewhere (I checked on IMDb) but they're well-suited to these parts.
Like I say, bad stuff happens in the film. At least the tide is comforting.