Clip was filmed on a Cine-Kodak 8, Model 20 camera by amateur photographer Harold Schenck
Disaster unfolded at Naval Air Station in Lakehurst, New Jersey, on May 3, 1937 after flight from Frankfurt
Existing newsreel footage shows a close-up view of the airship as it burned while falling from the sky
New film shows a wider shot of the airship as it burned and also reveals moment landing ropes were lowered