Found the interviews at the Sixth Floor website, as well as the camera ( Link ). Gordon was also lengthly interviewed on-camera fot the 1988 "The Men Who Killed Kennedy". Not sure what you're hoping but Grodon had lots of opportunity to indulge in his fantasy.
"Lazy" is you being unable to find the interviews and not addressing the gross mismatches in the Don Knotts Lab "science".
Seven days after the assassination Arnold writes a letter to his wife and nowhere mentions anything about this incident. Nothing about being in Dallas, nothing about watching the assassination, nothing about the encounter with these men. Not a thing. He mentions the camera but nothing about what supposedly happened.
He says right after the confrontation he left, got into his car and drove away (Bowers doesn't mention seeing any of this). He didn't stay around to see what happened to JFK. No interest at all. He says all of the shots came from behind him, from his left, over his shoulder. So how did JFK and JBC get shot in the back?
Zapruder is standing some 20 feet away from where Arnold said he was. On a pedestal. Filming everything. These men confront Arnold and take the film but let Zapruder alone? Zapruder arrives early, is walking around the Plaza trying to find a place to film. The men let him do this? They stop Arnold but Zapruder, 20 feet away on a pedestal, is left alone? After the assassination Zapruder has the in camera film developed and three copies made. But the government - Forrest Sorrels - asks for and is given two copies and lets him keep the original and a copy? Why would they do this if they are covering it up?
Et cetera, et cetera, et cetera....
His letter:
https://emuseum.jfk.org/objects/32576/correspondence-between-gordon-arnold-and-mary-seymore--one