***1/2 NINE INCH NAILS, “Closure,” Nothing/Interscope, $24.98

A sticker on the box warns of “material that some might find disturbing.” Well, duh! You don’t have to have seen the notorious “Happiness Is Slavery” video--in which a man is drilled, dissected and ultimately converted into chuck steak--to know that if it ain’t disturbing, it ain’t Nine Inch Nails.

“Happiness” is among the clips collected on the second of the two tapes in this set--a visually stunning and artistically presented, if sometimes hard to watch assortment of images of torture, debasement and decay. Most of them, needless to say, have not been shown on MTV (at least unaltered), and all in all they caused Interscope parent company Universal Music to decide not to distribute this collection.

The real prize is the first tape, a documentary of NIN on tour. Concert footage capturing all the music’s gothic angst is framed by backstage peeks of band members getting into makeup and destroying a green room. Leader Trent Reznor plots show strategy with David Bowie and chats with an admiring Lou Reed.

Cumulatively, Reznor’s penchant for perversity gets a bit old, but it’s always presented with elan. And the message that normalcy and depravity are not really far apart sneaks through at the strangest times. Early in the film, an employee at a Cracker Barrel restaurant enthuses that he’s going to hang an autographed NIN photo next to one of comedian Gallagher. Now that’s sick.