<http://schema.org/description>
"This doesn't appear to be one of Google's April Fools' jokes. YouTube's browser checker seems to be flagging Internet Explorer 8 on Windows XP and Internet Explorer 10 on Windows 7 ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2013/04/01/possible-bug-causes-youtube-to-detect-ie10-on-windows-7-and-ie8-as-no-longer-supported/>