: Plug the device into an HDMI port and ignore the TV's built-in "smart" features entirely. Troubleshooting Quick Fixes If your app stopped working, try these steps before giving up: How to Fix YouTube Not Working on Smart tv 4.4

If none of the above steps resolve the issue, it's possible that there's a hardware or software issue with your TV or the YouTube app. You may want to consider contacting the manufacturer's support or a professional for further assistance.