I would go on a quest researching past incidences of viewings/deaths caused by the video. Eventually I would trace it back to a mountain cabin, where I would open the well and find the dead body of the girl. Eventually though, I would realize that freeing her was a bad thing, and all I can do to survive to send the video out.
But in all seriousness: I'd think it was a joke. So no, there'd be no reaction other than laughter, and "who is this." And then on the seventh day, I'd probobly freak out and die. I think this goes for just about everyone, if you look at it realistically.