I'm seeing this request a lot (
and the correct answer being given too) but I thought I would make a "direct" post about it, with the answer in the title. With a lot of the newer DVD movies, a digital copy is included with the DVD movie you purchase. This digital copy allows you to put a copy of the movie on a DVD onto a portable media player such as a 'Plays for Sure' (a.k.a. Certified for Vista) player or an iPod device. Here's the thing, these digital copies
are not compatible with the Zune mp3 players.
While the video provided for the digital copy is indeed a WMV video it has a different type of DRM wrapper than what the Zune devices use for their videos. As a result, these WMV digital copies are currently incompatible with the Zune devices. Let's hope this changes in the future.
Zune MVP
Contributor, http://www.insidethecircle.net