We knew that YouTube Music Key would start rolling out this week, and it looks like it's in full force at this point. A bunch of us here at AP already have it, and from the look of our tip box, most of you do as well. If not, well, I'm sorry. Here's a quick look at what you're missing.

As expected, we've got offline playback (you can choose to save the videos in 360p or 720p), background playback, and ad-free music videos. If you have it on mobile, then it's also available on the web, so there's that, too.

At this time, it looks like the rollout is limited to Play Music All Access subscribers, especially considering it just seems to show up for users without any additional signup. Perhaps we'll see an expanded rollout happen in the coming days.

Thanks to everyone who sent this in!