Turn off Autoplay on Apple TV

“As an adult, it’s annoying. As a parent it can be offensive and scary. Go to the Settings app and select Accessibility, followed by Motion. Toggle off Auto-Play Video. You’re welcome.”

“Auto-playing video is the worst. I don't want to watch the preview. I don't want to start the next video automatically. I don't want anything whatsoever to just start moving or talking or blaring music on its own, ever, period. This switch in Settings > Accessibility > Motion (which for sure should not be buried there, come on) will stop auto-playing previews in the Apple TV app, and then this article has you covered on how to shut it off in other apps on an Apple TV box.”