To convince consumers they should update their precious video collections to DVD, movie companies often add enticing extras that can't be found elsewhere. It's a marketing gimmick, but film buffs win, too. Here are five movies that look better on DVD:

Le Grand Bleu (The Big Blue)

More than the story of a deep-diving man and his dolphins, director Luc Besson's first international splash is also a sensuous tour of the Mediterranean that yearns for the wide-screen canvas. Thankfully, the letter-box format restores the amputated vistas.

This Is Spinal Tap

The DVD has a cavernous vault of funny material that didn't make the final cut of this mock rockumentary. Deleted scenes as well as spoof commercials and music videos help trace the progression from skiffle to loony metal of "one of England's loudest bands."

The Perfect Storm

The Perfect Storm

An optional commentary by Sebastian Junger -- author of the book upon which the film is based -- spans the length of this blustery movie. Junger contributes a string of anecdotes that lend an absorbing documentary edge to the big-budget version of his book about the disappearance of the fishing boat Andrea Gail and her crew during a titanic clash of weather systems. A DVD extra that is better than the film itself.

Butch Cassidy and the Sundance Kid

Still buddies 30 years on, the titular principals -- Paul Newman and Robert Redford -- reminisce in front of the camera about the making of one of the first and best revisionist westerns.

Out of Sight

Steven Soderbergh -- director du jour since his double nomination at this year's Oscars -- and scriptwriter Scott Frank add an irreverent commentary to this sophisticated film about a mismatched romance between a bank robber and an FBI agent. Why certain shots were made; why scenes were discarded, etc. A crash course in filmmaking.