If you encounter a "617 391" style error or general connection failure, try these verified fixes:

: When looking for links to download apps outside of the official app store, it's crucial to prioritize safety and security. Unauthorized sources can pose significant risks to your device and personal data.

If your TV supports it, the most secure way to get the latest features and highest quality is through the official apps: Official YouTube : Update via the Google Play Store

Are you installing this on an that has lost official YouTube support, or