'Crossroad' was originally a multimedia stage play, given at the Westminster theatre (you can find a host of material related to this London theatre and arts centre). The production was later turned into a film, which you can watch here.
Another play made in to a film is Pickle Hill. It tells the story of Frank Buchman’s first experiences of bringing change to a college in Pennsylvania, when the students were going to strike. Buchman’s work there brought some dramatic changes in some key people. The college even started to win its football games! In particular he helped a man called Bill Pickle to stop drinking.