3 URI.IframeWhitelistRegexp = %^http://www.youtube.com/embed/%
5 <iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/RVtEQxH7PWA" frameborder="0" allowfullscreen></iframe>
7 <iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/RVtEQxH7PWA" frameborder="0"></iframe>