[neverending]

Yah- I'm aware of how this plot device works. Filmmakers have been exploiting it since Peeping Tom. I've been watching this type of movie since before you were born.

In his description the filmmaker (or his PR guy, or whoever our poster is) doesn't say "this is the story of Jonathan Ranier, who made videotapes of his victims"...

He says

Abundant Sunshine IS THE ASSEMBLED HOME VIDEO TAPES...

We can hash it out amongst ourselves ad infinitum... or we can await more clarification...