For example: Unregisterd users would be able to view the Media Tab, Thumbnails and Categories. But when they click on a thumbnail for a photo or uploaded video. They would get a message. "You need to be a registered user to view this photo/embed video/album." or "You need to be a vip member to view this photo/embeded video/album"
NOTES: This add-on requires XenForo Media Gallery installed.