I think it's at least 10 years old.
It starts in some kind of a sports hall, there is a school match going on when suddenly everybody gets teleported (?) to another dimension (?) and then a crazy guy starts killing people.
Later only one of the kids make it back to his own world, the rest remain trapped.
One of the last scenes is him watching the television and when some interference occurs he says it's caused by the people who remained trapped.