The worst part of YouTube app is it cant perform multitasking. Let me explain in details in points.
Firstly while listening to songs and music or while watching videos if some one sends u a message and if u want the song to play in background while u check the message it will not happen it will stop and again u need to start the whole process again
Secondly the video content are not all verified and while watching video too many ads which is quite frustrating
Thirdly and lastly THERE SHOULD BE SEGGREGATION OF VIDEOS ACCORDING TO CATEGORY WHICH IS NOT.
OVERALL the look and feel is good and if this points are checked happy to use or else not