@TeamYouTube I'm unable to change my channel banner, despite following all the steps on your guidelines. It gives me a pop-up with "Sign in with Google to access this feature", I click it twice, and then I'm told "This feature is unavailable", and that's all the popup says. Help?
Good to hear that you were able to change it – note that you can no longer edit your channel banner on your mobile device. For a better experience, do it on a desktop computer. Here's more info for your future reference: https://yt.be/help/sg6D