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Eastern SD | Sounds like the disc probably has a region code on it... it was designed for european viewers. It's not a different format or encrypted or anything, the DVD player just 'knows' that it doesn't play discs made with that region code on them. The DVD player in the car probably uses a drive designed to be distributed in vehicles around the globe, and is thus regionless.
If you can watch it on the MAC, you should be able to copy the video and burn it onto another DVD with the appropriate region code (or no code).
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http://en.wikipedia.org/wiki/DVD Then click item 7 in the index.
Each DVD-Video disc contains one or more region codes, denoting the area[s] of the world in which distribution and playback are intended. The commercial DVD player specification dictates that a player must only play discs that contain its region code. In theory, this allows the motion picture studios to control the various aspects of a release (including content, date and price) on a region-by-region basis, or ensure the success of "staggered" or late theatrical releases from country to country. For example, the movie 28 Days Later was released on DVD in Europe several months prior to the film's theatrical release North America. Regional coding kept the European DVD unplayable for most North American consumers, thereby ensuring that ticket sales would be relatively unaffected by the late theatrical release.
In practice, many DVD players allow playback of any disc, or can be modified to do so. Entirely independent of encryption, region coding pertains to regional lockout, which originated in the video game industry.
From a worldwide perspective regional coding may be seen as a failure.[1] A huge percentage of players outside of North America can be easily modified (and are even sold pre-modified by mainstream stores such as Amazon.co.uk) to ignore the regional codes on a disc. This, coupled with the fact that almost all televisions in Europe and Australasia are capable of displaying NTSC video, means that consumers in these regions have a huge choice of discs. Contrary to popular belief, this practice is not illegal[2] and in some territories that strongly support free trade (Australia being the best example) it is encouraged.
A normal DVD player can only play region-coded discs designated for the player's own particular region. However, a code-free or region-free DVD player is capable of playing DVD discs from any of the six regions around the world.
Most low-cost DVD players that are sold in supermarkets or other cheap outlets, are not multi-region[3]. Some of the more expensive players e.g. Sony, Loewe etc. are multi-region[4].
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DVD format differences??
