The system was called upon during the first half at the John Smith's Stadium after Juan Mata had made a run in behind the Huddersfield defence and rounded Jonas
Lossl to put United 2-0 up.
Referee Kevin Friend called for VAR assistance despite minimal protests from the Huddersfield players. In retrospect Mata looked just as he did in full speed, level with the defender.
VAR caused more controversy after Juan Mata had a goal ruled out for offside on Saturday
BT Sport showed a freeze-frame shot of wonky lines used by VAR to rule out Mata's goal
They later showed an image with straight lines on that Neil Swarbrick actually had used