O brother

Unfortunately, I can't understand most of what they spoke... I don't understand why the jail breakers sang on the stage in spite of the risk and joined a religious cultic activity. Is it because of thier eagerness to entertain other people and help dying person? I don't understand why the can waxes appeared so many times, either. I heard the film is not so old, so I think the oldfashioned can wax must not be sold and it mustn't be advertisement. Anyway, its BGMs are good. I want to listen them again.