This boy has a video recorder with the plan to commit suicide. He intends to leave the experts for their attempts to figure out why he would to it. The school kids find out so one girl girls him... ahem, something "inappropriate" because she thinks it's hot that he'll be dead. Soon though he feels power and explaining it to his friends they plan to join making a "suicide" cult. One of the boys uses his dads credit card to buy them all camcorders. One day left, they control their last day and record it. Soon though one goes mad with this power. I can't remember the name though!

Is this it?
State's Evidence (2006) - IMDb (http://www.imdb.com/title/tt0378804/)