Xinema is the ideal application for playing QuickTime movies in full screen. QuickTime Player can play movies full screen, but only if you purchase the Pro version for $29.99. Xinema brings you full screen playing for free, and provides controls for pausing, fast-forwarding and adjusting the sound volume during playback.
You can also control the movie playback by using keyboard shortcuts, for example the arrow keys to step 10 seconds or one minute forwards or backwards.
Version 1.5.1: Properly works with multiple screens Now displays time on the progress indicator Added option to play movies automatically when opened from Finder Now displays the actual icon of files Lots of bug fixes and improvements
Mac OS X 10.1.5 or later
*Previously available here