@TeamYouTube Why am i not able to change my custom url to http://youtube.com/c/davn when its available but its telling me this when i trypic.twitter.com/4WmJu84ygP
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The custom URL should be unique for every channel. We'd recommend following the suggestions and adding the changes to be able to claim one. Let us know if you have any questions.
it is unique tho its not taken i have checked it says the channel isnt there did you even look at my screenshots...
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