Titanic Sub: Lost at Sea is a documentary (or glorified news segment) about the OceanGate submarine that imploded this year. It’s a peculiar piece of media because it was made before the wreckage was found, which gave it criticism for its timing.
My main point is: I haven’t found a place where it has been archived and the My5 website no longer has it available. Wouldn’t this make it lost media?
Unrelated to that event. But there was this old animation on YouTube years ago sometime in the late 2000s. It showed the submersible Alvin which discovered the wreck in 1986. But malfunctions and hits the ocean floor while venturing down.