There should be a checklist for the refs operating VAR… question 1. Was there something clear and obvious that the ref missed, yes or No?
That’s it! If yes, ask them to go and look at it, if they’ve already seen it and made a decision then you play on. IMO if you have to look at a dozen different slow mo replays to see if something did or did not happen then it isn’t clear and obvious. VAR checks should be 10 seconds and that’s it.