First releases are IMAX projects.

Online video-on-demand (VOD) service CinemaNow announced today (Oct. 12) that it has begun offering high-definition films for download from its Web site.

CinemaNow claims this is the first time an online VOD service has broadly adopted HD movies.

The first films available through CinemaNow's "High-Definition Channel" are MacGillivray Freeman Films' IMAX projects, including "Coral Reef Adventure."

The HD titles can be downloaded in the Windows Media HD format by users with Windows XP-based PCs.