Personally, I would not categorize this as a documentary, instead, this video is an Elco promotional film. The production of this film was photographed and directed by Wallace Van Nostrand and supervised by Thomas A. Kelly, The video was compiled and edited by The Princeton Film Center and narrated by Van Deventer.
At the time, Elco was a naval division of the much larger Electric Boat Company of Bayonne, New Jersey. Elco was/is known as a manufacturer of pleasure boats prior to and after World War II.
This is the same boat type as PT 109 (PT-109) that was lost while John F. Kennedy served as Skipper.
VIDEO HERE (30 minutes)
-Chris