Added the option to subscribe to channels directly from the TV interface.
If version 1.3.11 is not appearing in your TV's app store, you can install it manually: youtube for android tv 1.3 11 apk download latest version
Use a USB drive or an app like Send Files to TV (available on Google Play) to move the downloaded file from your phone/PC to your Android TV. Added the option to subscribe to channels directly
Go to Settings > Security & Restrictions and toggle on "Unknown Sources". youtube for android tv 1.3 11 apk download latest version
This specific update introduced several core functionalities that defined the modern YouTube TV experience:
YouTube for Android TV 1.3.11 (arm) (Android 4.2+) - APKMirror