У вашего броузера проблема в совместимости с HTML5
So really, all that I know that the error (502) was a error of Youtube going offline for the World Wide Web. The cause that might be a rumor is some person on their profile on Youtube, uploaded a inappropriate Youtube video of sexual touches. Youtube is now back up, if you are still getting this Error, you might want to try getting a new browser, resetting your router or modem. Like this video if this video helped, comment below for my problems you all have, thanks for watching. Bye Youtube!