The QuickTime MPEG-2 Playback Component provides QuickTime users with the ability to import and play back MPEG-2 content, including both multiplexed (aka muxed, where the audio and video tracks are interleaved together into one track) and non-multiplexed (aka elementary) streams.
The QuickTime MPEG-2 Playback Component is ideal for previewing MPEG-2 video such as that used in DVD-Video content authoring. But there are some kinds of MPEG-2 media that are not supported by the MPEG-2 Playback Component.
A note about copyright
This software may be used to reproduce materials. It is licensed to you only for reproduction of non-copyrighted materials, materials in which you own the copyright, or materials you are authorized or legally permitted to reproduce. If you are uncertain about your right to copy any material, you should contact your legal advisor.