<http://schema.org/thumbnail>
"http://yospace-cds1.reuters.com/u/resize~ad1~120x120/0/f/~image_jpeg~9999-1/1/m/l/9/y/3/mpgs/reuters04?videoId=53452614"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.reuters.com/video/2012/12/28/scientists-use-urine-to-make-stem-cells?videoId=240164076&videoChannel=4>