<http://schema.org/description>
"It's useful to know how to record screencasts. These videos of what's displayed on your computer screen, with an audio commentary if you choose, are a good way of easily sharing a problem ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apple/2011/01/15/how-to-record-quick-easy-screencast-videos-with-mac-osx/>