New Samsung TV, Apple TV app flickering including through Airplay

Hey BubblyBev,

We'd recommend reviewing this article as it provides steps for troubleshooting Apple TV app issues: If you can't watch or stream movies and TV shows in the Apple TV app - Apple Support

"If the video quality is bad or it stops playing

1. If multiple people on your network are using the internet, your connection speed might slow down. Ask them to temporarily pause their internet activities.
2. If you're using a smart TV or streaming device, turn it off and back on again. If you're using an Apple device, restart it.
3. Tap or click the download button to try downloading the movie or TV show instead.*

* You can't download movies or TV shows to Apple TV, smart TVs, or streaming devices. You can download HDR content only to certain iPhone, iPad, and iPod touch models. You can't download 4K video content to any device."

If that doesn't help, we'd suggest testing with other streaming apps to see if similar issues are occurring with that TV. That would help to narrow the issue down further.

Thanks!