https://techcrunch.com/2019/09/30/youtube-tv-is-now-available-on-fire-tv-devices/

Earlier this year, Google and Amazon reached an agreement to bring their streaming video apps to each other’s platforms, following years of anti-competitive, anti-consumer behavior on both of their parts. Initially, the official YouTube app launched on Fire TV devices, while Prime Video launched on Chromecast and Android TV. Today, YouTube TV has also now become available on Fire TV devices, including Fire TV-powered televisions, Amazon announced.

In a blog post, the company says the official YouTube TV app will launch on Fire TV Stick (2nd Generation), Fire TV Stick 4K, the all-new Fire TV Cube, plus Toshiba, Insignia, Element, and Westinghouse brand Fire TV Edition Smart TVs. It will also be supported on some previous generation Fire TV devices, including the Fire TV Cube (1st Gen), Fire TV (2nd Gen), Fire TV (3rd Gen — Pendant Design).