Sometimes the best features come when tech companies let their programmers and designers play around a bit. That's certainly the case with YouTube's "Dark theme," which arrives today on the iOS version of the app. (The darker theme will come to Android "soon.") The feature, which is already available on desktop but pretty well hidden, lets you change the regular bright white theme to a more cinematic, black and grey look. YouTube says Dark theme was one of the "top requested features on mobile."
YouTube rolls out dark theme to iPhone apps now, Android later - CNET
After YouTube launched the darker design option on desktop last year, users clamored for it to come to Apple and Android mobile apps.