The BBC Sounds TV app has a Screensaver feature which will prevent screen burn on your TV when the app is left running for a long period of time.
The screensaver will kick in after 5 minutes of inactivity. Depending on what you're doing when it starts up, you'll either see the programme you're playing, recommended programmes or the BBC Sounds logo.
The screensaver will slowly move. It might not be noticeable but don’t worry, it’s enough to protect your screen!