A way to host your own API that converts youtube video's to mp3/mp4 and returns a download/stream link and information.

Through Amazon's Fire TV platform, you'll be able to access all of the popular streaming services, such as Netflix and Amazon Prime Video, and you'll also be able to initiate voice commands ...

While you aren’t very likely to be able to fully take advantage of this TV for a few years, if you really want something that can run 8k resolutions ... Prime Video, Hulu, and YouTube.