From the official Star Wars Youtube channel.
Many have seen the early Ralph McQuarrie sketches of Boba Fett sporting the all-white helmet and armor. What you haven't seen is the original white Fett costume in action. A videotape was rolling to capture "proto Fett's" reveal to Lucas and company at the filmmaker's home on June 28, 1978. In the video, sound designer Ben Burtt "hosts" Fett's reveal, describing the different weapons, functions, and characteristics of the costume (worn by Empire's assistant film editor Duwayne Dunham for the test).
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