What is QuickTime?
A powerful multimedia technology with a built-in media player, QuickTime lets you view Internet video, HD movie trailers, and personal media in a wide range of file formats. And it lets you enjoy them in remarkably high quality.
With its simple design and easy-to-use controls, QuickTime Player makes everything you watch even more enjoyable. Its clean, uncluttered interface never gets in the way of what you’re watching. Want to speed through a movie or slow things down? A handy slider lets you set playback from 1/2x to 3x the normal speed. And you can search through individual movie frames quickly.