All this time YouTube never develop own applications even though we know that since the first generation iPhone YouTube does already exist, but it is not an official application from YouTube but rather developed by Apple, that sometimes we have to open it again m.youtube.com using the Safari browser.
YouTube looks has not been disturbed until finally heard rumors that Apple's plans to replacing and eliminates YouTube app from iPhone and immediately made his own application to replace YouTube so that iPhone users are more comfortable if they want to see the official MV.