Wirelessly posted (iPhone 16GB: Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A93 Safari/419.3)
It's an MPEG 2 file. To use them in iMovie, try MPEG Streamclip (www.squared5.com). I've used it on .mod files from a JVC camcorder with great success. Basically it will convert the .mod file into something more useable (including .dv)