I agree with @GT49er . Whilst clear and obvious will have an element of subjectivity, the vast majority of people will understand especially when they see the VAR images. Can you imagine any sane person arguing the Dunk image conclusively shows him offside?
I’ve said this before, but the reason the offside law was introduced was to stop players hanging around upfield and ahead of the ball. It’s being used as a very different tool today.
The system/process isn’t workable for such tight decisions.
That link states the images are 50 frames a second. Given the speed with which balls can be kicked (Ronaldo clocked at 35 metres per second apparently) there is quite a margin for error when the moment the ball is kicked. 70cm...