It's at 3:15 of CougarLucas' video. Play action, he gets a good block from Balderree. Bushman crosses and is fairly open in the middle of the field for like eight yards. Balderree is wide open after breaking off his block and probably could have gotten around five yards. But Shumway is also open for a gain of 15 if the ball is thrown quickly and on target (not the easiest throw to make, but not the hardest either).
Critchlow does the play action and without staring any receiver down, appears to see all three opportunities. It seems all season that Tanner would have hesitated, and then stared down Bushman and thrown the more dangerous pass to him.
Critchlow just seemed confident and comfortable back there. The fact that there was some pressure didn't phase him, and he didn't wait until someone was wide open. He just turned after the play action, saw his opportunity, and took it.
Not a groundbreaking play, just an example of what we haven't seen much of lately.
Let me add that I love Tanner Mangum, think he's an amazing kid and truly wish him all the best. I feel bad it didn't turn out like we all hoped this season but hope he can get healed up and regain his old magic, whether at BYU or elsewhere.