Video of using iframes for custom tabs on Facebook pages.
How to create custom tabs is a process that continues to change. Here is a way to set up apps to use as page tabs, that was working in April 2011. Also shown, the use of [[php]] for displaying different things on the tab based on if the user has liked the page or not.
[trafficplayer_skin padding: 29px 0 0 70px; margin: 0 auto; width: 714px; height: 472px; background: url(https://www.mywebtools.biz/wp-content/uploads/skin4_640x385.png) no-repeat top left; text-align: left;][trafficplayer_youtube_video width=”640″ height=”385″ src=”http://www.youtube.com/embed/iCUF3zV9xj0?&showinfo=1modestbranding=1&autohide=1&controls=1&hd=0&rel=0″ ][/trafficplayer_youtube_video][/trafficplayer_skin]