Four movie studios will start releasing films on the secure version of a new digital videotape format called D-VHS. Artisan Entertainment DreamWorks SKG, Twentieth Century Fox and Universal Studios said Wednesday that they will use JVC's D-Theater, the version of D-VHS that cannot be copied. D-VHS is not meant to compete with DVD or VHS, both of which are designed for the mass market. Instead, the D-VHS format and its players offer owners of high-definition TV sets the option of recording and watching high-quality video. D-VHS players can also use VHS tapes. D-VHS tapes, which offer a 44GB capacity, can record and play four hours worth of shows from high-definition televisions