There can be some general DVD playback issues when using the standard Apple DVD player when playing any DVDs. These issues can manifest themselves as sound, video or performance issues.
These issues appear more persistent when using the DVD software version 5.
You can obtain other program updates from the following website.
If this does not help, you can download a new piece of software to play your DVD, called VLC, you can get this here:
Please use this new program to play the DVD.