Thanks Skuzzy they were old films. 
If you know what version of the game they were made with, you can grab an old copy of the game, install it in a different folder and use it to view/covert your films.
What I do each time we release a new update (not a patch, but a major update) is go into the game install folder and rename the "films" folder to the version the films were recorded with (i.e. v2_32). That way if I ever need to view those films again, I know what version I need.