Our esteemed Webmaster, Marc, gives a good explanation of why video looks so 'clean' here:

http://www.videoforums.co.uk/reviews...2_articleid/76

He also describes how to get a realistic 'film' look by using a plugin like Magic Bullet. There are watermarked demos available at:

http://www.redgiantsoftware.com/magicbullet.html