As of today 14 December 2020 YouTube server got down which happen very few in some years .The main reason behind the failure maybe a inside fault of the YouTube down as these prestigious company work a lot to maintain their user experience at best level but sometime even the google cant keep that for constant.
If you go to YouTube and try to search the video this screen will shown up.
A monkey with a hammer with a message of "Something went wrong". google have reputation of solving these type of system failures in minimum time so don't get worry and meanwhile try other streaming platform like twitch.
