Open the Google Play Store on your TV, search for "YouTube," and select Update .
When the automatic update fails, sideloading the is the most reliable solution. Warning: Only download APK files from trusted repositories. smart tv youtube 617 391 download latest version upd
The newest version isn’t just about features like 4K playback or voice search. Each update patches the “handshake” protocol—the digital greeting your TV sends to YouTube’s servers. Errors 617 and 391 appear when your old app uses a deprecated handshake. Google regularly sunsets support for older versions, effectively locking you out until you upgrade. Open the Google Play Store on your TV,