Usually, QuickTime comes installed on all Mac computers, while those who are using Windows computers can download and install the plugins for their respective browsers. In case there are any videos on a web page that have been embedded with the QuickTime format, the program can be used accordingly in order to run those videos. The program has become quite popular, and plugins are also available, which can be installed on your browser and can be used accordingly. Simply put, QuickTime is a media player that was created by Apple and allows users to play back audio and video. One of the most prominent media players, QuickTime has quickly become quite famous for its ease of use and the functionality that it provides.