Some info on the time line of the films and such...
DHARMA Initiative - Lostpedia
The Swan Orientation Film is a film produced by the Hanso Foundation to instruct the inhabitants of the Swan, a DHARMA Initiative station. The film's official title is "3 of 6 - Orientation". It is narrated by Dr. Marvin Candle and bears a copyright date of 1980. The film was revealed by Desmond in the episode "Orientation". It was hidden behind a copy of the book The Turn of the Screw.
The Pearl Orientation video seems to be the Pearl's counterpart to the Swan Orientation film. Unlike the film found in the Swan, the movie is on a Sony U-matic video tape, rather than a spool of film.
Known members of the DHARMA Initiative are:
Alvar Hanso - Funder of the Initiative, and narrator of the overall orientation video from 1975.
Gerald and Karen DeGroot - The Initiative's founders.
Marvin Candle/Mark Wickmund - A man who instructs the orientation films, found in the Swan and the Pearl, he identifies himself in the films as, respectively, Marvin Candle and Mark Wickmund. He was also seen on the computer in the Flame.