Movies

I recently read an article by Rabbi Avraham Stav (https://www.makorrishon.co.il/opinion/652051/)
And a question arose in my mind: What are the standards for a film that is allowed to be watched? If it is in a series that everyone knows has sexual content, but you have some benefit from watching it (and the question is what is the benefit? Historical knowledge? Or something else?) will it be allowed?