Q. How would you reference a movie with multiple producers in APA format? Would this be correct: Berger, A. & Yerxa, R. (Producers), &
Overall your reference looks fine. The way you formatted the producers and the director is correct. Essentially, these individuals are treated as the authors of the work and the parentheses clarify their role in creating the film.
I also wanted to note that you should be sure to italicize the title, Nebraska. As for the medium notation, Motion picture is fine, but if you watched the film in a specific format, such as DVD, you could use that instead to be more specific. If you watched the film as streaming video online, you would add a retrieval statement to the end of the reference, e.g. Retrieved from https://www.netflix.com/