Concept is to download your favourite videos to watch later but you need to renew you downloaded videos after every 30days
youtube also have youtube go app which can be useful to go live if you have a youtube channel
features included to watch movies, listen songs, watch new every videos download you favourite videos to watch later
icon design is red rectangle shape and in the middle have white play button
my experience is really awesome with the youtube app its really useful I will suggest everyone to use the youtube app over youtube.com