It is a beta version of the app for the purpose of developer testing. Therefore, it might be unstable. On the app, you can download YouTube videos on your phone (or SD card) and send it to other devices. It works for Android version 4.1 and above.
India has been the wellspring of various Google ideas like Offline Google Maps, YouTube Smart offline features, etc. These features were designed to help the internet deprived Indian population which also serves as a large potential market for the search giant. Eventually, the unique features become popular across other countries.
