Der Flussbaumeister - Wie Tulla den Rhein begradigte
Starring Steffen Schroeder, Karl Leven Schroeder, Johann Schroeder, Thomas Cermak, Matthias Zajgier, Stefan Krischke, Klaus Cofalka-Adami
It's a documentary and history movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United States.