To watch YouTube content on a Smart TV, start the YouTube app on the TV, access the Sign In page, and find the necessary activation code. Log in with your Google account on your computer, select the desired identity, and enter the activation code in the appropriate field.
After starting the YouTube app on the Smart TV, navigate to the Sign In page, and leave it open. Use your computer to navigate to the Activate section on YouTube.com, sign in with a Google account that is linked to your YouTube channel, or create a new one, and select your personal identity. After selecting the desired account, type the code shown on the Smart TV, click Allow Access, and confirm the access once the confirmation screen appears on the TV.
Alternatively, navigate to YouTube.com on your computer, sign in with your Google account, click on the profile icon, and then click on the YouTube Settings button. Click on the Connected TVs option in the navigation menu, find the activation code that’s displayed on the Sign In page of the Smart TV YouTube app, enter the code in the field located in the New TV section, and click Add This TV. Once you pair the Smart TV to your YouTube account, click on the TV icon next to the Full Screen button while playing a video to select which screen should display the content.