Learn Spanish (Spain): No hablamos durante la película.

Yes! For regular verbs ending in -ar like hablar, the form for we is exactly the same in both the present tense and the simple past tense. You have to rely on the surrounding context to know if it means we do not talk or we did not talk.

Why is there no Spanish word for we in this sentence?

In Spanish, the ending of the verb usually tells you who is doing the action. The -amos ending on hablamos specifically means we. You can add nosotros or nosotras at the beginning for emphasis, but it is completely natural and very common to leave it out.

Do I need to use de after durante, like we often do with después?

No, durante is used directly before the noun it refers to. You just say durante la película without adding extra connecting words like de.

Why does película have an accent mark on the letter i?

The accent mark shows you where to put the voice stress when saying the word out loud. Without it, the standard rules of Spanish pronunciation would make you stress the second-to-last syllable, which is cu. The printed accent ensures you correctly emphasize the li instead.