@TeamYouTube
can I request a change to my custom url? it’s only been changed once, but that was years ago...I tried changing it recently but the site won’t allow me to change it...please help 
First, check out the general eligibility requirements here: https://yt.be/help/4moa . If you're eligible, you should see a notice in your advanced account settings. And to get set up, just follow the steps outlined in that same help resource!