“I was thinking since it was a world record for longest movie, guinness world records might have some idea of what happened to the film.”
After scrolling through all their film related records on the website (http://www.guinnessworldrecords.com/Search.aspx?q=movie) they don’t even mention a current longest film. Arguably the record for the world’s ‘fastest movie’ does give us the shortest one: http://www.guinnessworldrecords.com/world-records/9000/fastest-movie-.
I doubt they know anything, as long as an official with a stopwatch was present during the screening the record would have counted. I don’t think they are in the practice of saving the subjects of their records, even less in the process of copying such a film.
However, any clue is welcome, and I will add them to the list of people to write to. I haven’t been able to spend as much time on writing everyone about this as I would’ve liked.