The term "DVDRip" refers to a type of video rip or copy that is derived from a DVD source. A DVDRip is usually of high quality, capturing the video and audio directly from the DVD. This indicates that the video is likely a high-quality, unofficial (or fan-made) digital copy of the OVA, intended for personal use or sharing among fans.
Due to the age of the anime, physical copies of the Eizou Hakusho DVD can be difficult to find. Most fans rely on digital archives.