While you can't change the custom URL of your channel, you can remove it and claim a new one. Please refer to "Remove custom URL & claim a new one" section of our Help Center article for detail steps: https://yt.be/help/oaZF . Hope this helps.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
While you can't change the custom URL of your channel, you can remove it and claim a new one. Please refer to "Remove custom URL & claim a new one" section of our Help Center article for detail steps: https://yt.be/help/oaZF . Hope this helps.