Youtube is a good app through which you can easily access a large number of videos including movie trailer, songs, tech videos , how tos and other videos my experience with app and good and bad things I found are as follow-
Bad things about the app-
Lot of advertisement are shown between the videos, before running of videos and and in the app here and their it was irritating for me.
We can't download videos through the app for transferring to other devices.
Good things about the app-
The only positive I found this app has is that you have access to a large number of videos including trailers of movies , music videos etc.
Hope this review will help you.