YouTube is rolling out a redesign of its site that includes a dark theme that lends the site a more cinematic feel. You can wait for the new design to hit your computer or you can opt in by going to youtube.com/new . YouTube's designed site features a new Dark Theme feature. After signing into your account, you will be able to activate Dark Theme from the account menu by clicking on your profile icon in the top-right corner.
It's Always About My World . ;)