Baseball and instant video review will create havoc in the game. Eventually use of video review of umpire calls will lead to review of balls and strikes. That would be an devastating result. The game might then just be a video game instead of a ball game. Only pitchers capable of perfection…(impossible) could be used in a game.
Checking the tape for home runs makes sense. The need to check can’t possibly happen with any significant frequency. Therefore the rules should allow for 3 reviews for each side in a game.