This picture is a screencap of a /x/ post about "The Grifter".
This article explains the hoax a lot better than I can.
Basically The Grifter is a story posted by a 4channer explaining a movie that was much like the vhs in Ringu. When you watch it you feel disturbed, maybe even kill yourself. He claimed that the video called "The Grifter" was posted on /x/ in 2008 but was quicky burried because it was too disturbing. For a week after it was posted people were freaking out over the validity of the post, looking for links to the video, and eventually the hoax caught on and /b/ came to troll any believers. The believers and trolls all seemed to disappear after some film school students recognized the screen caps from a movie called "Little Otik" and the original poster admitted to the hoax. Case closed.