YouTube TV gains “voice remote” on Android devices

Suddenly, many YouTube TV users noticed their Android clients have been gifted with the option to control the app by voice. Apparently, you'll be able to access “voice remote” from the floating action button that now appears in the Android app.
Since this is a server-side update, you'll be notified when “voice remote” becomes available on your Android device, so don't try to look for the new feature in the Google Play Store just yet.
source: AndroidPolice