With recent releases of Quicktime and OSX Leopard Apple has removed the need for most people to purchase the professional version of Quicktime to do simple things like play video in full screen. This is a great development but it still doesn't address the fact that as a video player Quicktime is limited in the number of video codecs it supports out of the box. Fortunately Perian is a fantastic Quicktime extension which handles the installation and updating of a range of third-party codecs (including DivX) through one very simple interface. A great tool that when combined with the Flip4Mac Player provides gives Quicktime the ability to play almost anything you can throw at it.
