I paused it and the camera angle looks like it goes nearly to halfcourt in a few angles. He is completely not found. Was he standing past midcourt or at midcourt? He's not there.
I watched the whole celebration to to see if he walked past in the background to head to the tunnel as well and he doesn't even do that.
He must have walked off after the team entered the tunnel or something because the team walks off, but you never see Stevens. Even after all the chaos.
It's like he was standing at halfcourt, never moved during the celebration. Maybe turned around and asked if it was good and then followed the team through the tunnel after the celebration. Somehow managed to never be on camera.