Not the way those cameras do it. You would need to stop video record, switch to a still shooting mode, shoot, switch back to video record and start video record. All that is possible, but it takes a lot of time meaning your video will have a gap of several seconds minimum (and of course you will get a lot of video files too).
Basically it's probably not worth writing a script for this purpose unless you get tired switching modes from the dial or if you need to do this automatically or with a remote shutter.
