I have a sony 5MP at 16 Fps. My experience is that digital cameras are not good for video clips. Not only do they all usually use different player formats but they also need a lot of light and the resolution is not good compaired to video cameras and you have to hold it very still. There is nothing like a good cheap camcorder.
Cameras are getting a lot faster so mabey the new ones are better. Here is a good site for info on digital cameras.
http://www.dpreview.com/
At the time I got mine, Sony was the only one that used mpeg format at that price so that is why I got a sony. It's pretty nice to get a little mpeg vid at the touch of a button even though it's not the best quality.