Most arguments about VAR are actually arguments about something narrower than they appear. People are rarely disputing whether video review should exist. They are disputing whether a particular intervention was allowed to happen under the rules, and that question has a precise answer that very few broadcasts explain.

The protocol sits in the Laws of the Game, and once you know its shape, most of what looks arbitrary turns out to be the system working exactly as designed, including the parts that feel wrong.

VAR can only look at four things

This is the constraint that surprises people most. The video team is not a general-purpose appeals court reviewing anything contentious. It may examine four categories and nothing else:

  • Goals, including the attacking phase of play immediately preceding them
  • Penalty decisions, both given and not given
  • Direct red cards, but not second yellows
  • Mistaken identity, when a card goes to the wrong player

A shocking foul in midfield that the referee waves away is not reviewable unless it warranted a straight red. A blatantly wrong throw-in is not reviewable. A soft second yellow that reduces a team to ten men for an hour is, remarkably, not reviewable either, because a second caution is not a direct red card.

That last exclusion causes more grievance than almost anything else in the protocol, and it is not an oversight. Extending review to second yellows would mean reviewing first yellows too, and reviewing every caution would slow the game to a crawl.

The threshold is deliberately hard to clear

Within those four categories, VAR still may not intervene simply because it disagrees. The standard is a clear and obvious error, and the wording is doing real work.

The intended reading is roughly this: would any competent official, watching the available footage, agree the on-field decision was wrong? If yes, intervene. If two reasonable officials could watch the same clip and reach different conclusions, the threshold is not met and the referee's original call stands, even if the VAR privately would have given it differently.

This is why you sometimes see a penalty appeal that looks fifty-fifty go unreviewed. A fifty-fifty call is, by definition, not a clear and obvious error. The system is designed to correct howlers, not to relitigate every marginal judgement, and a great deal of frustration comes from expecting it to do the second thing.

Factual versus subjective, and why it decides who looks at the screen

The protocol splits reviewable incidents into two kinds, and this determines whether the referee walks to the pitchside monitor.

Factual decisions have a correct answer that does not depend on interpretation. Was the attacker beyond the second-last defender at the moment the ball was played? Did the ball fully cross the line? Was the foul inside or outside the area? For these, VAR simply establishes the fact and informs the referee, who accepts it. There is no monitor review, because there is nothing to interpret.

Subjective decisions require judgement. Was the contact enough to constitute a foul? Was the challenge reckless or did it endanger an opponent? Was the handball offence deliberate, or was the arm in a justifiable position? For these, if VAR believes the threshold is met, the referee is recommended to review the footage personally at the monitor, and the final decision remains theirs.

So the walk to the screen is not the referee being overruled. It is the opposite: it is the system insisting that a judgement call stays with the person who was on the pitch.

Why the delays happen

Every goal is checked. All of them, automatically, every time. The overwhelming majority of those checks complete in a few seconds while play is restarting and nobody notices.

The long ones happen for two reasons. First, the attacking phase of play may contain several reviewable moments stacked on top of each other, and each must be examined in sequence: a possible foul in the build-up, then a possible offside, then a possible handball in the box. Second, an offside call requires establishing the exact frame at which the ball was played before the lines can be drawn at all, and when the touch is soft or obscured, finding that frame is the slow part rather than the measurement.

What the protocol cannot fix

It is worth being straight about the limits. VAR makes factual errors much rarer. Offside goals that should not have stood, penalties awarded for fouls that happened outside the box, red cards shown to the wrong player: these are largely solved problems now.

What it cannot do is make subjective decisions objectively correct, because subjective decisions do not have objectively correct answers. Whether a particular shoulder-to-shoulder challenge is a foul is a judgement, and putting it on a screen at high resolution does not convert it into a fact. Reviewing it more slowly, from more angles, sometimes makes it look worse than it was in real time.

Refereeing is not the only part of the game where the published rules explain more than the arguments do; the same is true of how the league divides its money.

The consistent complaint about VAR is really a complaint that football contains genuine ambiguity. The protocol was built to remove clear mistakes, and by that measure it works. It was never going to remove disagreement, and the competitions that use it have never claimed otherwise.