Most Mac users have probably heard of QuickTime. It has shipped with many applications and most Mac multimedia titles for the past few years. QuickTime 2.0 is currently included with System 7.5, and as of today, version 2.1 is available online for free (also make sure to get MoviePlayer 2.1, a QT2.1-savvy version of MoviePlayer).
ftp://ftp.support.apple.com//pub/apple_sw_ updates/US/mac/system_sw/other_sys_sw/ QuickTime_2.1.hqx
[If you have trouble getting through, try the same path at the short URL below