This plugin provides support for using oEmbed in your WordPress blog.
Rick media Example:
[oembed:http://polldaddy.com/oembed?url=http://answers.polldaddy.com/poll/2431815/&format=xml]
This will put the selected polldady poll on your blog
Photo example Flickr:
[oembed:http://www.flickr.com/services/oembed/?url=http://www.flickr.com/photos/23886028@N04/3983995799/in/set-72157622398187791/]
This will put a Flickr photo into your posting.
Video example Youtube:
[oembed:http://www.youtube.com/oembed?url=http://www.youtube.com/watch?v=yvdbqcbRH50&format=json]