<http://schema.org/thumbnail>
"http://yospace-cds1.reuters.com/u/resize~ad1~120x120/0/f/~image_jpeg~9999-1/1/m/v/y/m/l/leuq/reuters04?videoId=108005042"^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2015/05/16/romney-holyfield-box-for-charity?videoId=364248099>