Dialed in? There was one hit in almost 50 shots with the CZ 452 he used. It is impossible to get "dialed in" at that distance with a .22LR, especially shooting CCI Velocitor ammo with its wide extreme spread.
Of course the shooter in the video understood the role velocity played. Although he said he didn't chronograph the ammo, he observed that "some were faster than the others and some were slower than the others but the average was all about the same" -- a Captain Obvious statement if there ever was one.