WHAT DOES THIS CODING MEAN - It is POPPING UP on All MY Sites i.e. You Tube, Blog Spot ETC

Hacker's What does this Coding Mean. Prior to full log into my Accounts via You Tube, Blog Spot, etc.  This Code is showing.  I was able to capture it, and want to know Why this Code is showing up.  Also, what does www.youtube.coachella/coachellaalive - which can be found in the Coding Captured -  - have to do with My You Tube Channel??????????????????????

!!!!!!!!  HELP !!!!!!!!!

Full Code: