What types of HD DVD-Video discs can be played on HD DVD players?
Currently, product requirements and guidelines set by the DVD Forum require HD DVD-Video consumer electronics (CE) players and computer playback software to play HD DVD-Video content from prerecorded HD DVD-ROM, HD DVD-ROM/DVD-ROM Twin (two-layer) and 3x DVD-ROM discs. Other types of HD DVDs and DVDs are a matter of choice for each individual hardware manufacturer.