If you want to add a YouTube banner on your iPhone, there are a few different ways to go about it. The first way is to use the YouTube app itself. Open the app and tap on the three lines in the top left corner. From here, tap on “Settings.” Under “General,” tap on “YouTube Banner.” You’ll now be able to choose between a standard banner or one that’s designed for iPhone screens. Tap on the design you want and then tap on “Add.” You’ll now see your banner in the main area of the YouTube app. ..