If your activation code has expired, don’t worry — this is very common. Amazon codes are temporary for security reasons and usually expire within a few minutes.
Go back to your TV or streaming device.
Open the Prime Video app again on TV.
It will generate a new activation code for you.
Return to amazon.com/mytv on your phone or computer.
Sign in with your Amazon account (the same one you use for Prime Video).
Enter the new code.
Type the fresh code into the box and click Register Device or Continue.
Confirm and start streaming.
Once accepted, your device will be linked and ready to use.