What type of computer software is required to play HD DVD movies?
As with traditional DVD, playback software is required to view HD DVD movies on a computer. It can be purchased separately, as part of a larger package or bundled with a drive or recorder. Like consumer electronics (CE) players, various programs support different HD DVD features and capabilities. Be aware that Internet access is necessary to periodically renew the Advanced Access Content System (AACS) encryption key required by commercial movies. As of June 2007, CyberLink, InterVideo, Nero and ArcSoft offer playback software for PC systems but no Mac OS and Linux versions are yet available.