This is a 2011 HBO movie, dramatizing the production and airing of the PBS series An American Family back in 1972-73. It stars Tim Robbins as Bill Loud and Diane Lane as Pat Loud. The Louds, who lived in Santa Barbara, California, were filmed 24/7 for (IIRC) a year, and throughout the series, we pretty much watched the disintegration of their 22-year marriage. An American Family has been called "TV's first reality series". The film intercuts snippets of the real Louds throughout. Running time is approximately 89 minutes. Rated "TV-14" for language and adult situations.
Robbins seems to be treating the film as a lark, not seriously at all. I don't know if Bill Loud took the series seriously or not. Diane Lane's Pat Loud goes through a lot of the movie with an enormous chip on her shoulder in regard to her husband. Her anger is well served when she finds out he is cheating on her. She finally blows up at him, demanding he move out immediately. All in full view of the cameras. James Gandolfini (with a ridiculous wig) portrays the series producer, Craig Gilbert. Anytime I watch Gandolfini in anything, all I see is Tony Soprano.
Early in the movie, we see Bill Loud exiting a Checker cab with crash bumpers. Large crash bumpers weren't required on cars until the 1973 model year. The Checker used in the scene is at least a 1974 model. We also see VW Beetles with crash bumpers as well. Lane's Pat Loud is shown driving a Volvo station wagon with a driver's side airbag. Volvo didn't install driver's side airbags in cars until (IIRC) 1990.
Characters are shown using modular phones, which weren't developed until 1975. They were marketed in 1976.