The Video Assistant Referee (VAR) initiative is the somewhat cumbersome official title of global soccer's effort to see whether video replays can improve the game. The most recently stated ambition for VAR is to have it in use at the 2018 World Cup. To get to that level of broad acceptance and understanding by player, referees and fans, there is a lot of work still to be done on gathering information and experience from deployment of the technology in games around the world.
American professional soccer has been at the forefront of the worldwide VAR experiment.