Don't Click (2012)

Jeong-mi (Byeol Kang) lives alone with her older sister after their parents left for another country. She often uses the net to upload self-made videos, while in disguise, to garner internet notoriety. With the help of a friend, she got her hands on a blocked or forbidden video illegally. Unfortunately, a short time after, a series of escalating and horrifying events unfold to everyone who watches it. Now, her older sister, See Hee (Park Bo-Young), has to find the way to save her younger sister from the curse of the video before she completely goes down the brink of insanity or something much worse.