Google Vs MS : WP users are the victims
Yeah , there are many discussions about this.
Ultimately , Who's getting hurt the most ? WP users as well as Youtube userbase who use WP.
A normal consumer doesn't care reasons , he simply goes to store and downloads one out of 100's of youtube apps.
But not getting official apps is something which hurts WP over a long term because these apps may break at some point unlike official apps.