previews at the top of the Watch Now screen in the #AppleTV app have begun to annoyingly auto-play with sound. Awesome. Thankfully, you can (for now) turn this off in #Accessibility.
On #iOS/ #iPadOS/ #tvOS it's Settings > Accessibility > Motion > toggle Auto-Play Video Previews to "off."
On #macOS, Accessibility > Display > toggle Reduce motion to “on.”