Larry, To help resolve the issue with the YouTube app, I recommend running a cold reboot on your TV. There are two ways to do this: 1) Using the Remote: For most people, the easiest way is to hold down the Power button on the Samsung TV remote until the TV turns off and then on again. This should take about 5 seconds. 2) Using the Plug: If you do not have the remote, unplug your TV from the wall outlet or surge protector, leave it unplugged for 30 seconds, and then plug it back in. Next, I recommend ensuring the Youtube app is up to date by going to “Apps” on your Smart TV and selecting “Settings” from the top right corner. Next, select the YouTube app and select "Update," if available. If the issue persists or if there is no Update available, we will try deleting and reinstalling the YouTube app. To do so, navigate to “Apps” on your Smart TV and select “Settings” from the top right corner. Next, select the app. Finally, select Delete, and select Delete again to confirm. Then we will reinstall the app by returning to “Apps” on your Smart TV and selecting “Settings” from the top right corner. Click on “Youtube” and then select “Reinstall.” Also, please ensure you are running the latest Firmware update. Go to Settings> Support> Software Update. If you need further assistance, we would be happy to help! Please feel free to contact Samsung Support at 1-800-SAMSUNG, available from 8 AM to 12 AM EST, seven days a week. You can also chat with us on Samsung.com for immediate assistance. ~Samsung Pro