Dark Mode is nothing new on YouTube: PC and iOS users have had it for a few months. Android users have been left in the dark - until now. A small number of Android-wielders are reporting that they now have access to YT's Dark Mode. Anyone lucky or uninterested enough to receivet he update is reportedly being informed by a special message appearing in the bottom window of the app. The function can be turned on in the app's settings, just like in the iOS version.
Dark Mode appearing on a selected few Android devices is probably a part of a closed test of the function. We do not know when will it become available for everyone.