Is this Kindle Store App Legit or Bootleg?
To my knowledge, the only &quot;official&quot; Google apps are on Fire TV:
https://blog.google/products/chromecast/prime-video-chromecast-android-tv-youtube-fire-tv/
https://techcrunch.com/2020/07/09/youtube-kids-app-is-now-available-on-amazon-fire-tv/
And only consist of YouTube and YouTube for Kids.
I believe these are the apps referenced above:
https://www.amazon.com/s?rh=n%3A2350149011%2Cp_4%3AGoogle+LLC
Everything else is a third-party wrapper/interface.
As for the blue YouTube app, here is a 5 year old reference in a different forum. It may be that as long as the app is just a web browser wrapping the YouTube site (and showing ads), Google/YouTube will look the other way.