throw a film
'Echar una película' is a Spanish idiomatic expression. While a direct translation like 'throw a film' might not make sense in English, the phrase is commonly used to mean 'to watch a movie' in Spanish. It's frequently used in informal, colloquial conversation among native Spanish speakers. Thus, instead of 'throw a film', you should understand it as 'to watch a movie'.
Let's play a movie in the living room.
In this sentence, 'echar una película' is used to convey the action of playing a movie. It is a casual expression mainly used in Spain.
Tonight, I'm going to play a movie to enjoy.
In this context, the expression 'echar una película' refers to the individual action of playing a movie for personal enjoyment. The speaker is likely making plans for their evening at home.
Could you play a movie while I prepare dinner?
This sentence is an example of a request in which 'echar una película' is used. In this case, one person is asking another to play a movie while they are busy with something else.