Username 666 

A video where a person in japan named nana825763 goes to his youtube URL bar and adds /666 to his url bar and then refreshes several times until a video by the name of none.avi starts to play while the background changes to a red bumpy pattern with im guessing burn marks all over them and the youtube logo turns into a burnt and of course red mess and after a while message boxes with red x symbols start to show up with no text just empty buttons comments and titles and if you try to shut down or restart your computer it wont let you and will just play the windows ding sound and in the end a hand will grab you.

Someone : I just saw the username 666 video... im scared!

Someone else : Dont worry dude its fake

Username 666 by srcthesrc May 29, 2022

Username: 666 

A user on YouTube who was terminated for posting a graphic video.

Person 1: omg i hate username: 666 he is evil!!
Person 2: bruh... he is fake

Username: 666 by Ness EarthBound May 15, 2022

Username: 666 

A joke on Youtube where you type 666 on the end of the URL and refresh that Youtube page 666 times and the background of the page will become scary and a creepy ass video will play. Scary sounds will play in the video and at the end of it a hand will come out and grab you.
Pretty fucking scary when you see the video by nana825763.

Jack: OMG dude I just saw the Username: 666 video! I'm so scared!

Bob: Dude it's fake, chill out.

Jack: It's still scary...

Username: 666 by ButterscotchTruffle June 20, 2010