Several unexplained deaths are shown.

Several corpses (no blood) are shown throughout the movie.

The mysterious videotape has a message at the beginning reading "Watch till the end, or death will swallow you." At the end of the video, it is revealed whoever watches it will die in a week, and if they must survive they must do something, but the solution isn't revealed since a commercial cuts it off.

It is implied that Eun-Suh's mom is about to throw herself into an ocean, we see her standing on a cliff.

Eun-Suh crawls out of Choi's TV, presumably to kill him.

2 uses of "Fuck" and one use of "shit", as well as some milder terms (In Korean, of course)

Casual Alcohol drinking throughout.

Some may find the plot disturbing, as well as the corpses frightning. One shot of a corpse is shown for a cheap scare.