Teardown of updated YouTube for Android reveals new feature for older versions of the OS
At the same time, Google also pulled some stuff out of the app. Offline video playback, a music pass and background music playback were no longer found in the teardown. This doesn't necessarily mean that the features aren't coming, but could merely mean that the folks at Mountain View don't want to give away future features for YouTube. Amadeo suggests that this was Google's subtle way of acknowledging that it knows all about the teardowns and is trying to stop them from revealing any nuggets.
There have been high hopes for a YouTube music platform and for offline video play. We can't imagine that Google would really drop these now. And don't forget Android users, to update your YouTube app from the Google Play Store.
source: +RonAmadeo via AndroidAuthority