Remember Dapper Drake? All the fuss around it, being a LTS (long-term support) release, the three-month delay in order to make things stable, all the forum discussions regarding the 3-month delay in order to polish it well.
MPlayer is a movie and animation player that supports a wide range of codecs and file formats. It also has a plugin for Firefox allowing you to view streaming video from your web browser. This short howto will help you get it up and running in no time.