High-Density Videodisc

 (HDV) is an analog videodisc format manufactured by SDT and Eskque in 1978 in the Vlokozu Union. There was also a audio-only variant called High-Density Audiodisc (HDA), which was released in 1977.

Measuring 12 by 12 inches, each disc is stored in a caddy with a metal shutters and contained 75 minutes of footage per side. Unlike other videodiscs like JVC's Video High Density and RCA's CED, the entire caddy is inserted into the player and the shutter is pulled in order to read data from the disc.. At the end of the side the disc must be removed, turned over and re-inserted

Among all the companies SDT licensed for the HDV format included Vlokozuian Media Union/Media El Kadsre, Vlokfilm, El TV Kadsre Films, Viva Films (El Kadsre), Seiko Films and Republic Film Enterprises.

Production of HDV discs were ceased in 1990.