I purchased some footage of the Vietnam war that was filmed on Super 8. I don't know how the person who I purchased the footage from obtained it, & I'm unsure if she actually knows the soldier who made the films. I've had interest from a film-maker who wanted to purchase the footage from me to use in a film, but he requires a release from the soldier whom filmed it. What are the legalities on this? The Vietnam footage is from 1967. Many soldiers were in the films. Would I still require release(s) to sell it? Any insight would be appreciated!