Have you checked the 'Remove custom URL & claim a new one' section of our Help Center article on custom URLs. This may help answer your question: https://goo.gl/UTqwaV . Give us a shout out if you have any questions.
@TeamYouTube So Is There Any Way I Can Change My Custom URL Or Delete For A New One
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.