It has been nearly two years since the launch of YouTube Red, or as I like to say: The subscription that lets you actually watch YouTube. Prior to that, it was called YouTube Music Key and only served music videos and enabled background and offline playback. Now it looks like there might be a new subscription tier called YouTube Plus coming soon.
Disclaimer: Teardowns are based on evidence found inside of apks (Android’s application package) and are necessarily speculative and usually based on incomplete information.
YouTube v12.37 hints at a new subscription tier called YouTube Plus [APK Teardown] was written by the awesome team at Android Police.