Open your device's play store to download and install the Prime Video app.
Open the Prime Video app using amazon.com/mytv.
Then Register your device by selecting Register on the Amazon website.
Now you will be given a code to enter on a given website.
Register your device by enter your account information directly on your device.
To register your device using a registration code.
Find the 5-character registration code on your device by selecting Amazon Video home screen.
From your computer, go to Register Your Compatible TV or Device.
choose "register on the Amazon website" to get a 5–6 character code.
Enter your registration code in the text box.
Then code to enter in your account.
then you can stream amazon video.