what's his running vertical?
No idea , but we can guess.
He is 5'6'' , so his reach must be around the 7'4'' area , probably less but let's say he has long arms. For a dunk like that he needs to get at least 10'' over the rim ( again arguably but that's what it looks like and that's how much i need to do cuffed 1-handers ).
So 10'10'' - 7'4'' = 42''
Since this was an in-game dunk with a defender crashing him mid-air , id guess he could get a couple of inches higher at his best jump , i'd accept a legit 45'' RVJ speculation...