This page describes the evil parts of the DVDVideo specification.
Store-bought DVDs are commonly encrypted with CSS as a CopyControl measure. The encryption keys are stored in a special part of the disc that can only be accessed via a special handshake between the software and the drive, knowledge of which is only disclosed to those who sign an NDA with the DVD Copy-Control Association. Mass-market DVD writers cannot create discs containing this special key area.
One page links to DVDVideoEvils:
