“YouTube finally unveiled its subscription music service this week, and in some ways it?s very much like existing streaming music services, especially since it comes bundled with Google Play Music All Access. But YouTube Music Key also very much not like other streaming music services, because of the ways in which music is (or rather isn?t) defined on YouTube.

One of the first questions I had about Google Music Key was how the company would define what kind of content from YouTube gets included: Would a home-shot cover of a Black Keys song with 253 views be as ad-free as the official music video for the original? Or was this a private club, designed for the traditionally defined music industry? Turns out, the nature of what Music Key encompasses is somewhat of a moving target, and the limited beta access that will initially gate entry to the service is in part due to that variability.”

Read the full story over at TechCrunch, and another interesting take on Google Music Key from Mark Mulligan hereyoutube-music-key.