For people who want less complicated setup. I occasionally download films to my MacBook, enable File Sharing (System Settings > General > Sharing) and then connect to it with Infuse Player (https://firecore.com/infuse) on Apple TV. I pirate only when it is too hard to get the film from a streaming service. If you're into good films, I suggest checking Mubi service (https://mubi.com), much better collection than Netflix.