I need help Installing Amazon prime to my apple tv

Go to the App Store and find the Amazon Prime Video app. Select to “Get” it, so it will download and install.

Amazon wants to connect your Amazon account and services to your device. For this, you will need copy a registration code from the app to a web page. Follow the on-screen instructions.

Getting the Prime subscription and optional movie purchases or rentals will have to be done on the web, as the Amazon Prime Video app may not be able to all that in-app.

Find apps in the Apple TV App Store - Apple Support