Wikipedia
DcVD
DcVD (Dreamcast Video Disc) is the proprietary video format based on the MPEG SOFDEC exclusively for the Sega Dreamcast. It includes custom encoded video in Sofdec (.sfd) format as well as the mpeg sofdec program on a CD prepared for self-boot. Similar to standards set for DVD video, VCD etc., DcVD is an attempt to establish a video standard on the Sega Dreamcast Game Console.
At maximum bitrates, it is possible to fit approximately. 38 minutes of near DVD quality video at true 480p EDTV on one CD. (For true progressive scan, the DC VGA adapter is required.)