Comment by NickPollard

From what he says, it sounds like the app is really a standard movie player, plus their 'encrypter', plus a python script that does the following:

> calls 'decrypt movie_file' to create 'decrypted_movie_file' > calls 'play decrypted_movie_file' > calls 'delete decrypted_movie_file'

He just made a copy of the python script that calls their own decryption module but removed the delete line.