Android Police, YouTube Music Key is on the way soon and will bring many of the features that we have been expecting, like offline playback and more. The service will be ad-free, and it will allow for audio-only playback, offline playback, infinite YouTube mixes, and complete albums; but, this is still YouTube, so there are some interesting video features as well. The images of the updated app claim there will be "over 20 million high-quality tracks - complete albums, organized into artist discographies" as part of Music Key. And, since this is YouTube, you'll also get access to "watch concerts, covers, and remixes."According to
The YouTube Music Key service will cost $9.99 per month after a one-month free trial, and maybe the best part is that it will include a subscription for Google Play Music Key. Presumably, if you already have a Google Play Music All Access account, you will automatically get the YouTube Music Key subscription, but it is unclear if those who got the initial promotional rate of $7.99 will keep paying that price.
No word on exactly when the service will launch, but it appears to be soon.
source: Android Police