Now that camera/motion tracking is up and going in Blender, perhaps it would be good to list some resources for free footage.
I played around with it this weekend and learned a few things. Most important is that the iphone is NOT good for taking footage because of the image stabilization. It distorts the video in unpredictable ways such that I could not figure out how to correct for it. As long as you are standing still, it’s fine. But once you start moving, it introducing strange warping. The camera tracking can still solve for it, but the solution is pretty bad and is going to cause sliding when the image stabilization kicks in.
Anyway, the result is that I don’t have a camera to take footage and so I searched around the web for free footage.
http://www.hollywoodcamerawork.us/trackingplates.html is one place, though limited
videocopilot.net releases their source files, but you have to dig a bit to find tutorials with good footage.
Other places? Perhaps people will host their own footage that can be used for fun and testing?