This is Spinal Tap (1984) 

Legendary British heavy metal band Spinal Tap attempt an American comeback tour accompanied by a fan who is also a film-maker. The resulting documentary, interspersed with powerful performances of Tap's pivotal music and profound lyrics, candidly follows a rock group heading towards crisis.

Criterion Collection Edition Details:

Double-Sided Disc
Side 1 Features
The complete 82-minute movie, with dual commentaries: Track 1: Spinal Tap’s Christopher Guest, Michael McKean, and Harry Shearer; Track 2: Rob Reiner, producer Karen Murphy, and editors Robert Leighton and Kent Beyda
Side 2 Features
Original industry and theatrical trailers
Twenty-minute demo reel, Spinal Tap: The Final Tour
Promotional shorts: Heavy Metal Memories and “Hell Hole”
The Cutting Room Floor: More than one hour of deleted scenes, abandoned subplots, and alternate takes

Special Edition Details:
• Region 1 encoding (US and Canada only)
• Color, Closed-captioned, Widescreen, Dolby
• Over One Hour of Extra Footage.
• New Audio Commentary by Spinal Tap in Character
• New Interview with Rob Reiner
• Trailers and TV Spots
• Music Videos
• Rare TV Appearances
• Widescreen anamorphic format