QuickTime 2.5: Software MPEG Available

A few reviews of QuickTime 2.5 mention software MPEG playback is included. When I downloaded the software, I tried playing a MPEG video I downloaded, and it would not open or play.
QuickTime 2.5 as it shipped in August 1996, does not have the ability to decode, playback, MPEG encoded files. A separate software MPEG extension was released later that added the ability to decode MPEG files. QuickTime MPEG Extension requires a Mac OS computer with a PowerPC processor, 16MB of RAM, and QuickTime 2.5.
Published Date: Feb 18, 2012