Youtube Dissapeared!

[AC Question]

i had my phone switched off for 6 hours and when i turned it back on,Youtube wasn't there.I tried to re install it but it says i have insufficient storage but i still have 2 gb left.To make sure i uninstalled facebook which needs more storage than youtube and reinstalled it and it worked for facebook so i am guessing the storage is not the problem.I tried finding the solution online but i can't find it anywhere.What do u think is the problem and how can i fix it?