Great news! We love Amazon Prime Video and it’s now so great on our Apple TVs as a native app. Hundreds of shows and series in 4K and so much easier for Christine to enjoy her PBS series. Not to mention their huge library of free movies and shows. This has been a long time coming!
https://www.apple.com/newsroom/2017/12/amazon-prime-video-arrives-on-apple-tv-in-over-100-countries/