Hi there – if you're eligible, you should see a notice in your advanced account settings. To get your custom URL set up, just follow the steps outlined in this resource: https://yt.be/help/4moa Hope this helps but tweet us back if you have more questions!
@TeamYouTube Hi
We're eligible to claim a custom URL, but we're having trouble claiming one. Can you help troubleshoot? Please DM 
-
-
-
Thanks. Unfortunately we can't claim the custom URL we'd prefer even though it's available. See screenshots.pic.twitter.com/TQpDtusToB
End of conversation
New conversation -
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.