This is the 679th most frequent Russian word.
фильма
The Russian word "фильма" means "film" or "movie" in English.
The word 'фильму' here is used in the accusative case singular to refer to a film being the direct object of the sentence.
Я посмотрел фильму на прошлой неделе.
I watched a movie last week.
The word 'фильмы' here is used in the genitive case singular to describe possession or association with the subject, which is 'сюжет'.
Сюжет у этой фильмы интересный.
The plot of this movie is interesting.
The word 'фильме' here is in the prepositional case singular, denoting location within something, in this case, within a film.