Knife+Heart (2018) on Netflix

Plot summary

In the summer of 1979 in Paris, Anne produces and directs gay porn films. Her editor and lover Loïs has left her, and Anne puts her energy into an ambitious new production, while her friend and actor Archibald looks after the performers on set. One of her regular actors, Karl, is killed, and the police question Anne about him. She needs a new lead and finds Nans, a young miner who is straight but agrees to appear in her film. Anne decides to build the production around Karl's death and names it Anal Fury V. The crew gathers to shoot.