<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2012/10/tubes-520x245.jpg>
<http://thenextweb.com/google/2012/10/30/youtube-is-down-for-some-as-users-report-unreliable-service-for-several-hours/youtube_server_error/>