What I needed

Was looking for a third party app that allows me to change the quality of videos on cellular data, set a default quality and load just the sound without the video.
This app provided me all that and many more features. UI looks good and APP works well. Best third party YouTube APP.
Recommend it to buy if you are not happy with the official YT app

Grepozocker about ProTube for YouTube, v2.5.9