I have been using youtube since I learned to use internet.
Youtube mobile app provides a user friends nice and clean interface.
Many options are available like
Recommended, trending live music or tv etc.
You can personalise things by signing in with your google account.
You can create channels, create video blogs, create playlists and also earn money.
You can use it as a video sharing platform and publish your work here.
However I am using its android app and it works very smoothly.
You can set video quality appropriately according to your internet speed.
Overall happy with the experience.
Recently they are changong its interface for android and sometimes that come as a surprise without any warning that ui gonna effect and those who are not intersted should not update.
Thats why I think I will give it 4 stars and not 5.