Before Dinosaur Planet was retracted to become Star Fox Adventures, Rare released a few demo movies of Dinosaur Planet. Since then, a lot more footage has been released thanks to the game's legendary "unreleased" status.
64dd.net has a few other videos with additional content.
IOnEIFalcon released a huge one-hour video previously unseen gameplay, including the first 18 minutes of the game uncut.
The official trailer for Dinosaur Planet.