'Ref cam' shows live images from referees' bodycams before a game, in the tunnel, during the warm-up and at the coin toss.
Unlike rugby union, no live images are shown during the game and - although goals and moments of skill will be shown with a delay - anything controversial or in bad taste, such as a player suffering a nasty injury, will not appear.
Images will be available to the video assistant referee (VAR), but that is not the purpose of the innovation.
The footage of the challenge that led to Manchester City defender Rico Lewis being sent off during their opening match with Wydad Casablanca was broadcast - but the red card had already been shown.
Former international referee Pierluigi Collina says the technology is mainly an entertainment concept.
What it will do, Fifa believes, is show the game from a unique vantage point and "enhance the storytelling".