To link YouTube TV to your Roku device, follow these simple steps: First, ensure your Roku and TV are powered on and connected to the internet. From the Roku home screen, navigate to "Streaming Channels" and search for "YouTube TV." Install the channel and launch it. Next, you'll see an activation code on your screen. On a computer or mobile device, visit tv.youtube.com/start and sign in with your Google account. Enter the activation code when prompted, then select Continue to complete the process. Once linked, you can enjoy streaming YouTube TV directly on your Roku device.