<http://schema.org/image>
<http://rack.2.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzBmL2NvbnN1bWVyc3dhLmJxZy5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/8ed4cfbc/e4f/consumers-want-online-video-ads-no-more-than-15-seconds-long-7ceeb74774.jpg>
<http://mashable.com/2012/01/23/ideal-online-ad-length/>