Emulating film in writing is an easy trap to fall into. Overly long descriptions of complex settings and impartial narration as though attempting to show what a camera would see. But to write fiction in this manner is to sell yourself short. No one can portray a story in a film-like manner as well as film itself can. I’m not saying you can’t tell about the same story, the same characters, the same events. But you need to tell it differently to reach its full potential.
To me, beats serve three main purposes:
1. attribution: lets you know who is saying what.
2. characterization: actions speak louder than words, this can betray a lie, show nervous habits, convey more subtle communication between characters, any number of other things.
3. pacing. A longer beat conveys a longer moment of time between speech.
Trying to imitate cinema in prose rarely works very well, IMO. Prose can never imitate cinema well in this respect, and concentrating on this weakens the other aspects that prose can be better at. Cinema allows you to watch amazing events happen, but well-written prose allows you to experience it.