YouTube new UI with dark mode
YouTube正在测试的新版UI，自带了夜间模式
夜间模式设置方法：点击首页右上角个人头像，在弹出的菜单选项中开启夜间模式(Dark Mode)即可
Google apparently has a Material Design UI overhaul in the works for YouTube and it looks pretty good,and this script enable the new UI for yourself.
Here's how you do it to turn on the YouTube hidden dark mode:
Click on your profile avatar in the main settings menu in the top right,and the dark mode toggle is available.
