YouTube for Android was said to be getting a Dark Mode way back in March. It started rolling out to iOS devices on that day, but Android was given the dread Soon tag. Several months have passed since then and we found a way to enable it.
Many people are getting the “Try the new Dark Theme” notification pictured above. You will probably have to clear cache and data a few times to get the option to show up. This is a server-side switch, so you shouldn’t need to update the APK. Once you enable the dark theme it should look like what we’ve seen before.
For more details on this news , please visit this link: https://www.xda-developers.com/youtube-dark-mode-android-roll-out/