It depends on the type of video, but in most cases, speed control makes your video more attractive. Sometimes we need to speed up a video or some of its portion to keep the viewer engaged. Would you like to watch your picture album/slideshow in a slow-motion mode? Probably, Never! Mac users are undoubtedly a lucky lot to have the QuickTime as their default media player. Simple Steps to Play and Convert QuickTime Video (Free) Part 1. Tip for Playing a QuickTime Video on Windows and Mac Part 3.
