Please follow these following steps to allow a single Vimeo video (Example - player.vimeo.com/video/71574621), for all users while blocking all other Vimeo videos:
Create a custom URL category inside Objects > Custom Objects > URL Category and click add to create a new URL category, then click add again to add the URL as below. player.vimeo.com/video/71574621
Next, go to Objects > Security Profiles > URL Filtering. Click on the URL filtering name you want to use and then inside the allow list of the url filtering profile, add the following URLs: player.vimeo.com/video/71574621 *.vimeo.com *.vimeocdn.com player.vimeo.com/log player.vimeo.com/crossdomain.xml av.vimeo.com/crossdomain.xml player.vimeo.com/play_redirect a.vimeocdn.com/p/2.1.18/js/player.js a.vimeocdn.com/p/2.1.18/css/player.css *.*.vimeocdn.com
Add this URL filtering profile in the security policy to restrict/allow this Vimeo video.
Commit to make these changes take affect.
Note: This allows all users to access this single Vimeo video while blocking the rest of Vimeo. A decryption policy may need to be enabled, so that the Palo Alto Networks firewall can identify the Vimeo link properly.