kinda embarrassing that @youtube on ios has had dark mode for almost a year and most android users still don't have it
seriously, google. you own youtube and developed android. why did you think it was a good idea to roll out a new feature on another platform first?
Update: Dark theme is now available on Android. If you don’t see it yet, update or restart your app to get the feature. Check out this YouTube Help video to learn more about what went into launching dark theme for Android: https://goo.gl/uZmvKF