This is the 585th most frequent Spanish word.
películas
Movies.
In this sentence, 'películas' is used as a general noun to refer to films of the horror genre that the speaker enjoys.
Me gustan las películas de terror.
I like horror movies.
Here, 'películas' refers specifically to the two films watched on the previous night as an instance of movie-watching activity.
Anoche vimos dos películas en casa.
Last night we watched two movies at home.
In this example, 'películas' is used to describe films that the person intends to produce or create, referring to artistic or personal works.