As a former screenwriter, I'm well aware of standard Hollywood story structure. Essentially, the story is broken into 8 sections of nearly-equal length, with sections 1 and 8 typically being a little shorter, and sections 2 and 7 typically being a little longer. Sections 3-6 comprise the "second act", where the main characters move past obstacles towards the "big push" at the end.
However, the question asks about 2 things: cinema turnover schedules, and TV commercial breaks. Cinema turnover schedule only refers to how many screenings of a film can occur at a theater (cinema) in a day. Theaters generally prefer movies of 2 hours or shorter, so they can maximize the number of screenings and sell the most tickets. For example, Avengers: Endgame is about 3 hours long. If you assume 15 minutes between screenings to clean the theater and get the new audience seated, Avengers: Endgame can only be shown 4 times (per screen) in a 13-hour period. A 2-hour movie can be shown 6 times, and a 90-minute movie can be shown 7 times. More screenings = more $$$ for the theater.
The second point is about TV commercial breaks. Hollywood movie story structure was established decades before TV was invented. TV works around that structure. TV stations schedule commercials as needed. And sometimes they ignore the story's "beats" entirely; we've all seen plenty of films on TV interrupt tense action sequences or emotional moments to run commercials.
So to sum up, I think the original point was somewhat flawed. Hollywood scripts are a particular length because of movie theater requirements. But the story structure is just based on what mainstream audiences expect, not what TV requires.