Watching a movie is read as seeing your own story played out at a safe distance. The genre of the film in the dream is traditionally taken as the mood of what you are processing.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.