Breel Embolo plays for the Swiss team. In the game against Argentina, the referee gives him a red card. This means: He must leave the field. The video assistant gives a tip to the referee. He says: Embolo only pretends a foul. This is a trick. Before, the referee thinks Argentina makes a foul.
Now the rule makers from IFAB say: This is an error. The video assistant cannot help in this case. He only helps when the referee mixes up players. He cannot help to judge a foul again. The score of the game stays the same. Argentina wins 3 to 1 against Switzerland.
There is also a new rule against waste of time. When a goal keeper lies on the ground, helpers treat him fast. When helpers come to the field, another player must leave the field. This player must wait outside for 1 minute. The rule makers want to stop teams from wasting time on purpose. People test this rule soon in many leagues.