I don't know why no one is mentioning the horrible play Cobie Durant made. With the ball in the air he moved off Kmet (whom he had blanketed fairly well) and toward the goal line as the ball sailed easily over his head. I guess the simple answer is he misread it. If he just stayed where he was he likely knocks it away easily. The safety didn't even try to get there since Durant had Kmet tightly covered. After the catch you could tell the safety was asking him like WTF?
Williams got a lot on the throw, but it was a definite Hail Mary and needed Hail Mary luck or bad defense to connect.