How to Enable Dark Mode in YouTube App on iPhone?br br Step 1: If you have have not updated your YouTube App to the latest version, Go to the App Store, and update it.br br Step 2: Open YouTube App.br br Step 3: Tap on your Profile Picture at the top right.br br Step 4: Tap on 'Settings.'br br Step 5: Tap on Switcher next to 'Dark Theme' to enable it.br br br It's done.