YouTube is a media where you can see and search your targeted video. There are many beneficiary criteria of YouToube Mobile App. First is less data. In this app you can see video offline. Online videos consume mass data, if you want to save your data balance, than YouToube Mobile App is a good way.
Here you have to sign in, clicking the offline button on the right corner of the app, it will take some moment, when it will complete you can enjoy your videos without any internet connection.