Here's the first 10 minutes from The Cutting Edge: The Magic of Movie Editing. The film features interviews with many of Hollywood's leading editors and directors, as well as well-known sequences from a number of films.
Listening to Walter Murch describe his approach to the craft within the confines of his pristine workspace is worth the price of admission.
And you can avoid the hassle of watching a degraded copy in segments on YouTube. The Cutting Edge: The Magic of Movie Editing is available for purchase or you can rent it from Netflix.