So is film of public executions not considered snuff?
If you check out the link I posted earlier it has some pretty good explanation/definitions.

I read somewhere else that the difference that sets snuff apart is that films like "Faces of Death" merely chronicle death on film, whereas snuff choreographs death on film.

I would think a public execution was being performed for reasons other than to excite the viewer sexually, which is really what snuff porn is all about isn't it?