###INSTRUCTION: Fix grammatical mistakes in this sentence: The element film and the media that was difficult to recognize was editing because I did not know what the directors took out or what he pouted in the movies or what cast members he put in or taken out to made the film so great.
###RESPONSE: 
The element in the film and the medium that was difficult to recognize was editing because I did not know what the director took out or what he put in, or what cast members he put in or took out that made the film so great.
The element film and the media that were difficult to recognize were editing because I did not know what the directors took out or what they pouted in the movies, or what cast members I put in or taken out to make the film so great.