Hey there! If you're looking for an Unhangout permalink, we're sorry to say that they have been retired. It was a good run!
If you're looking for a new online meeting room with a short, custom URL, we recommend checking out Jitsi Meet. They're open source and use WebRTC :)
We are very sorry for any inconvenience this may have caused you. Please reach out to us at firstname.lastname@example.org with questions or comments.
And in the meantime, check out the new Unhangout!
-- the Unhangout Team