I an using this app from past 2 years and found that this is app is awesome.Thank god to google that they created this app.
I said it is multi tasking because:
I can watch thousands of videos of different different genres.You can watch movies, trailer, vines, serials, cartoon, learning and thousand more.
I can create video and upload it one YouTube where thousands of people can watch me and get very popular.
I also can earn money by uploading me own video and I will be payed by YouTube. YouTube puts ads on your videos and 1 thousand people will watch your video then you will get 1 dollar.The YouTube is going very well and it group is increasing.Guys I would have recommend you to join YouTube now without any tension.