The Free On-line Dictionary of Computing (30 December 2018):

QuickTime

    Apple Computer's
   software for playing audio and video.  The QuickTime
   application is a free media player.  QuickTime Pro is a
   paid-for version with editing ability.  QuickTime's native
   format for audio and video is .mov but it can handle many
   others.

   (http://apple.com/quicktime/what-is)

   (2011-01-04)