Since the videos in the system are served from a separate location, if you are connecting through a firewall you may need to ask your administrator to grant access to additional sites. Granting access to player.vimeo.com as well as *. vimeocdn.com will generally allow only specific videos to play. However, if you would also like to browse videos posted by other people on Vimeo, you will need to allow *.vimeo.com.