<http://schema.org/thumbnail>
"http://yospace-cds1.reuters.com/u/resize~ad1~120x120/0/f/~image_jpeg~9999-1/1/m/g/v/x/6/4y7o/reuters04?videoId=32324256"^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2012/01/31/facebooks-evolving-social-network?videoId=229431458>