Sexual snuf films like this do NOT exist.

At least not in first world countries.

And I'm clearly stating sexual films (rape and murder). Excluding narco cartel videotaping of their killings (which is done in failed state countries like Mexico and thus can literally do anything they want, but said videos are terror propaganda, NOT made for profit).

James Woods stated it best in Videodrome: Why would anyone do it for real? It's easier and safer to fake it.

That's the simple truth. Camera angles, cheap F/X and competent acting can do wonders (even create the illusion of unbroken camera shots, just look at Irreversible).

Since there's not even a niche market for snuff films (unlike for say kiddie porn), it's simply not worth the legal risk. NOBODY will bother do it for real and if you pay them rel good, they'll make you a really good fake one.