Complex sentence: Originally, and briefly, billed as "Dr. Caligari 3000" when it debuted at selected theaters in 1989, the film promptly faded into obscurity and was only released on VHS and limited Betamax formats as "Dr. Caligari".
Split into simpler sentences: Originally, and briefly, billed as "Dr. Caligari 3000" when it debuted at selected theaters in 1989, the film promptly faded into obscurity. When it was released on VHS and limited Betamax format, the title has since been "Dr. Caligari".