At one time Gaspar Noé directed a short movie called We Fuck Alone, in which a man and a woman masturbate to the same pornography all while the camera flies aimlessly around and the lighting is either really bad or straight up flickering strobe lights.
In Vortex, Dario Argento (yes, him) and Françoise Lebrun play an elderly couple suddenly separated without really being without each other
Noé's camera is like the most intrusive, perverted and curious godlike being you will ever experience