QuickTime is an extensible multimedia framework capable of handling various formats of digital video, picture, sound, panoramic images, and interactivity. QuickTime for Microsoft Windows has always been downloadable as a standalone installation, as well as being bundled with Apple's iTunes. QuickTime Player is limited to only basic playback operations unless a QuickTime Pro license key is purchased.

Apple's iTunes is a proprietary media player computer program, used for playing and organizing digital music and video files on desktop computers. It can also manage contents on iPod, iPhone and iPad. iTunes is an application that allows the user to purchase and manage audio and video on a personal computer, acting as a front end for Apple's QuickTime media player. Officially, using iTunes is required in order to manage the audio of an ...

“The QuickTime MPEG-2 Playback Component provides QuickTime 7 users with the ability to import and play back specific forms of MPEG-2 content. It is available as a separate purchase and download from the Apple Online Store. If you've purchased and installed the QuickTime MPEG-2 Playback Component, here is how to determine which version is installed on your computer.”

“QuickTime Player 7 supports older media formats, such as QTVR, interactive QuickTime movies, and MIDI files on Snow Leopard and OS X Lion. It also accepts QuickTime 7 Pro registration codes, which turn on QuickTime Pro functions. QuickTime Player 7 will be installed in the Utilities folder in the Applications folder.”