The first release was a 1998 Criterion edition which used supplemental material from the 1994 Criterion laserdisc release. It included an audio commentary track with Christopher Guest, Michael McKean and Harry Shearer; a second audio commentary track with Rob Reiner, Karen Murphy, Robert Leighton and Kent Beyda; 79 minutes of deleted scenes; Spinal Tap: The Final Tour, the original twenty minute short they shot to pitch the film; a mock promo film, Cheese Rolling; a TV promo, Heavy Metal Memories; and a music video, Hell Hole. Sales of this edition were discontinued after only two years and the DVD has become a valuable collector's item. Much of this material had appeared on a 1994 CD-ROM by The Voyager Company that included the entire film in QuickTime format.
In 2000, MGM released a special edition with new supplemental material. It has a new audio commentary track with Guest, McKean and Shearer performing in character throughout, commenting on the film entirely in their fictional alter-egos, and often disapproving of how the film presents them; 70 minutes of deleted scenes (some of which were not on the Criterion DVD); a new short, Catching Up with Marty DiBergi; a shorter version of Cheese Rolling; the Heavy Metal Memories promo and six additional TV promos; music videos for Hell Hole, Gimme Some Money, Listen to the Flower People and Big Bottom; segments of Spinal Tap appearing on The Joe Franklin Show; and the theatrical trailer. The special features were produced by Automat Pictures.
Some will find this strange, but I'm a new convert to "This is Spinal Tap." How? Well, at nearly seventy years, I'd nearly missed the experience entirely, but last night, April 5, 2009, after watching my North Carolina Tar Heels beat Villanova, I switched over to TMC, I think, and "Best in Show" was playing, another movie I'd missed. Then the guy comes out and introduces "This is Spinal Tap." I decided to watch it, and for the next couple of hours I was laughing as hard as ever I had! Great stuff! I'm going to get the BluRay thingy when it comes out!