http://*.flickr.com/* http://www.flickr.com/services/oembed/ http://*.pownce.com/* http://api.pownce.com/2.1/oembed.{format} https://*.twitter.com/* https://api.twitter.com/1/statuses/oembed.{format} http://*.vimeo.com/* http://vimeo.com/api/oembed.{format} http://*.youtube.*/* YouTubeProvider