NOTE: I am only talking about countries where making adult films are legal
Most Helpful Guy
California so far is the only state successfully sue for someone posting a video of them. I imagine that this is goign to set a precedent and become more and more the lay of the land.
now if you video tape someone without their knowledge, not on your property and without a warrant that is illegal.
beyond that if you tape a person on property that belongs to you the person on tape can sue for defamation (the case in California that recently went for the prosecution...the person suing for the being filmed)
copyright law is irrelevant if you don't have consent from the participants which obviously means making them aware of the tape and they have to sign off on your ownership of the film