Robert, a visitor to the Mac 911 forum, is interested in a list of QuickTime Player keyboard shortcuts. I'm here to help.
Spacebar or Return = Plays if it's stopped and stops if it's playing
Command-. = Stops playing
Up Arrow = Raises volume
Down Arrow = Lowers volume
Shift-Up Arrow = Really cranks the volume
Right Arrow = Advances movie one frame
Left Arrow = Steps back one frame
Command-Right Arrow = Plays forward
Command-Left Arrow = Plays backward
Option-drag resize movie = Scales move to next acceptable size
Control + Play button = Plays movies without Sound
Command-Option-Spacebar = Plays all movies