You Tube is good for:

• Uploading video, thus putting your content out there for millions to see
• Imbedding your uploaded video or other peoples videos in your site -  this is useful when somebody makes a good political video
• Speading a political message via rich media

See Articles on YouTube:

• The YouTube-ification of politics: Candidates losing control

   

   

   

  The video below is a recent pannel from the New Politics Insistute talking about the explosion in video in politics.