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