You can enter your YouTube activation code on the YouTube activation website using your phone, tablet, or computer browser.
Follow these steps:
Open the YouTube app on your Smart TV or streaming device.
Select Sign In to get the activation code.
On another device, open the official activation page: yt.be/activate
Enter the code displayed on your TV screen.
Sign in with your Google account and confirm access.
Your device will automatically connect to YouTube.
You can use this process for:
Smart TVs
Roku
Amazon Fire TV Stick
Apple TV
Chromecast
Xbox
PlayStation
Android TV devices