If your Smart TV abruptly stopped streaming videos and displayed error code 617 or 391, you are experiencing a common playback handshake failure. This issue typically happens when your TV’s cached app files fall out of sync with YouTube’s server protocols.
The search terms "Smart TV YouTube 6.17 391" refer specifically to a popular third-party, open-source YouTube client known as Smart YouTube TV
Resolves issues such as the app getting stuck on the loading screen, error code "617" variations, or connection issues [2]. How to Download and Install the Latest YouTube App If your Smart TV abruptly stopped streaming videos
Go to your TV's > Apps > YouTube . Select Clear Cache and then Clear Data . Reopen the app and attempt the update. 3. Reinstall the Application
Smart YouTube TV 6.17.391 (noarch) (Android 4.0+) - APKMirror How to Download and Install the Latest YouTube
How to download or update (general steps) Android TV / Google TV:
How to Update and Download the Latest YouTube App on Your Smart TV select "Update" next to YouTube.
Press the button on your remote to launch the content bar. Open the LG Content Store or Apps portal. Navigate to My Apps or search specifically for YouTube .
If version 6.17.391 is available for your hardware, select "Update" next to YouTube.