The media component displays media content, such as audio, video, or image in a player
embedded in the user agent. The media control displays the media specified by the "source" attribute ]
in the appropriate media player. If a particular media player is desired, it can be specified using the
"player" attribute. The media control attempts to intelligently handle two tricky aspects of
cross-platform media display--determining the best player to display the media, and sizing the media player.