I routinely recieve 3GP video files that the native quicktime player doesn't handle. Hence I need to save them to disk and play them with mplayer instead.
However the default filename suggested by Swirly is really obscure and makes it very difficult to find the last saved file. A simple YYYYMMDD-HHMM.ext scheme would be much better. Now I have to type that by hand each and every time.
An option to launch mplayer for movies would of course be even nicer.