Google has the use to update their own catalog of applications each week. In the case of YouTube (see here additions of previous version), usually it is different, the application for excellence in video playback online takes a different pace, as from time to time add new features and some extra, plus solve common errors, improve performance and correct minor details to make latest new design standards.
This time as many others, we can read the latest news about it through AndroidPolice, among them are some interesting, some small fixes and other minor details.
As you know, YouTube makes great use of Chromecast, and its role has been slightly increased, then they added a Permanent Cast Icon button in the upper right, in order to have on hand at all times be able to play content to TV in question. The decision is also pure logic and drive the use of your device.
Material Design simplicity is essential, and have decided to spend the broom sweeping the selector of privacy. Now we visualize a sharper appearance, along with more successful and refurbished icons, meaning they offer the option to choose.
With the arrival of new subscription plans, YouTube is offering new features to the public as this, adding the ability for users to download audio from videos so desired, allow offline playback of these when we have no data connection certain times, or to not consume megas are much needed addition for many of us. In the code it has clearly found a line where you can read "Audio Only", this probably means this feature is upcoming.