ARS Technica: The first full-resolution rip of an HD DVD movie has appeared on BitTorrent. The movie, Serenity, was made available as a .EVO file and is playable on most DVD playback software packages such as PowerDVD. The file was encoded in MPEG-4 VC-1 and the resulting file size was a hefty 19.6 GB.
This release follows the announcement, less than a month ago, that the copy protection on HD DVD had been bypassed by an anonymous programmer known only as Muslix64.
The open-source program to implement this was called BackupHDDVD and was released in a manner designed to put the onus of cracking on the user, not the software.
To extract an unencrypted copy of the HD DVD source material required obtaining that disc’s volume or title key separately, which the software did not do. However, a key was later released on the Internet, and a method for extracting further keys is allegedly available as well.
Additional sources: HDTV Blogger