YouTube Vanced allows you to play videos even when your phone is locked. This is the responsibility of the “Background” function, which is located on the main settings screen. More detailed parameters can be found on the tab”Vanced Settings”. For example, the preferred quality when using Wi-Fi or mobile Internet. A nice bonus will be that the application has no advertising.
The app has the same interface as the original YouTube. But if you look at the settings, you can find a lot of additional features. The dark theme is available in the General section. Go to it, activate the switch “Night mode”, and the interface colors are immediately inverted.