Funny you mention that, about a week ago i recieved this unmarked VHS tape in the letterbox, so i buried out my old vcr from the basement, hooked it up and watched it.
It was a 1/2-ish minute short, bad quality, looked like some kind of student film with weird imagery, very muted blueish colors, and some cheap "shock" closeups on icky things.
Sometime after i recieved a call about the video that told me some date (didn't really listen).
I guess it's some kind of viral marketing, really annoying and invasive though.