YouTube Vanced is a hacked version of YouTube with premium features such as ad-free videos, background play, and AMOLED dark mode. To access it, download Vanced Manager from a reliable source, install YouTube Vanced and MicroG (for logging in), open the app, sign in if necessary, and set up settings such as ad-blocking and theme preferences. Have a better YouTube experience without interruptions. Keep in mind that it's discontinued, so alternatives such as Revanced are available.