The Believers
Starring Kevin Ashley, Karen Ashley, Irving Dardik, Rod Decker, Martin Fleischmann, Sheila Fleischmann, Pam Fogle, Ryan Freilino, Thomas Gieryn, Eric Golab
It's a documentary and drama movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.