how to update apple tv

What is your model Apple TV? Identify your Apple TV model - Apple Support

Update your Apple TV - Apple Support

• Apple TV (2nd generation) can be updated to system software version 6.2.1, but no further.
• Apple TV (3rd generation) can be updated to system software version 7.8, but no further.
• Apple TV (4th generation or later) can be updated to tvOS 15.2 (current version).

• On Apple TV (2nd generation), Prime Video is not available.
• On Apple TV (3rd generation), Prime Video is standard available with system software version 7.2.2 or later.
• On Apple TV (4th generation or later), the Prime Video app is available from the on-device App Store.

You are best searching the Prime website for advice. There is a Prime app for the Apple TV (assuming you have a recent model that can upload apps via the ATV''s App app) but setup is a little complicated.