This is a masterclass with the legendary editor/sound designer Walter Murch. If you have anything to do with films, you have to know this man. He has literally shaped some of the greatest cinematic marvels from the last few decades. This masterclass was held at the Sheffield Doc/Fest in 2013.
As the video description states:
Universally acknowledged as a master of picture editing and sound design, Murch has worked with, among others, director Francis Ford Coppola on such cinematic milestones as The Conversation, The Godfather I, II and III, and Apocalypse Now. From the point of view of someone who started working in theatrical features when computers were completely absent, to now 45 years later when they are omnipresent, Murch will explore the constants that nonetheless remain after the “bones” of celluloid and sprockets have dissolved away, and examine the salient technical, artistic, and philosophical differences between the post-production of a theatrical scripted film and a feature-length documentary.