https://wccftech.com/google-confirms-that-google-play-music-subscribers-will-get-access-to-youtube-premium-and-youtube-music-premium-for-no-extra-cost/

Yesterday, Google announced the release of a new and improved YouTube Music and YouTube Music Premium in the coming weeks. YouTube Music is expected to replace Google Play Music completely, while YouTube Music Premium is advertised as a replacement for YouTube Red. Confused? So are we. In an attempt to clear the air, Google Play Music had this to say in yesterday’s Tweet:

If you're already a Google play music subscriber, you'll get YouTube Red (soon to be YouTube Premium) along with YouTube Music Premium.