On your Smart TV’s home screen, look for the Prime Video app.
If it’s not installed, go to your TV’s App Store:
Samsung TV: Apps → Search → “Prime Video” → Install
LG TV: LG Content Store → Search → “Prime Video” → Install
Android / Google TV: Play Store → Search → “Prime Video” → Install
When you open the app:
Select “Sign In and start watching” (if your Amazon account is already on the TV)
OR
Choose “Register on the Amazon Website” (this shows an activation code on the TV).
The screen will show something like this:
Your code: AB12CD
Go to: primevideo.com/mytv
Leave the TV on this screen — you’ll need this code in the next step.
Open a web browser and go to 👉 https://www.primevideo.com/mytv
Log in using your Amazon account (email & password).
Enter the code displayed on your TV.
Click Register Device.