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I believe this is the Duke DVD version of the VHS tape some of us in the UK have already bought.
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The UK Duke website offers the DVD in both PAL (European) and NTSC (USA) formats. If you're going to buy it for viewing the the US, you probably will need a DVD player that can handle the PAL format, or get the DVD in the NTSC format.
http://www.dukevideo.com/products/3680NV.htm
For some reason
US version of the Duke website doesn't carry the video.