I'm having the same issue my youtube stoped working and says connection to server lost, touch to retry. All I see is the black screen and the circle going with no results, I've cleared cache on YouTube, cleared, Google play cache, have done gone to settings, apps, apps manager, more, and resethe app preferences, and still nothing. Tried to uninstall but will not let me bc it says is an international app. When I remember clearly downloading it my self. Ive already done factory reboot, Im lost for words at this point, i have good home wifi conection so I dont underdtand. dnt know what else to do or try.