Hello, I'm Emily, I have more than 8+ years of experience in technical service providing, here to help you with your roku device-related problems. Are you facing problem in youtube not working on Roku? update the YouTube app on your Roku. Using the remote control, select the YouTube app and then press the asterisk (*) button. In the pop-up menu, choose Check for updates and let Roku install an update for the app, if there is one. Now try YouTube again.