You can see the play at the 47-second mark in the video below:
The basic formation is a shotgun set with Derrick Williams and Stephfon Green in the backfield flanking Clark on either side. This formation is a staple of the "Spread HD" scheme and, in this situation, draws in the Temple linebackers who are seemingly expecting a run given the speed PSU has loaded in the backfield.
The 6-foot-6 Brackett motions from left to right in the formation and aligns himself behind the right tackle, taking on the appearance of a blocker as he angles his stance 45 degrees.
On the snap, Green shifts left to right for added protection of Clark as Williams hits a short, wide route to the right, which freezes the left outside linebacker who pulls up to stay in his zone, forcing him to release Brackett who hits an out route.
Williams streaks down the wing, pulling up the coverage on Norwood and drawing any defensive help away from Brackett, who continues his streak route.
The offensive line does a solid job picking up the initial Temple surge and shifting it wide left for the play to develop. Unengaged after pulling short to block, Green then accelerates on a similar route Williams took to serve as a check-down target in the case Brackett, Norwood and Williams are unavailable.
The right outside linebacker for Temple remains in his zone, in case Clark decides to tuck the ball and run a misdirection route to the left of the formation.
With the Temple safeties focused on the wings, Brackett stops and sets at the 5-yard line in a no-coverage zone after the safety fails to pick up the zone release from the linebacker.
Clark deliver a sharp pass to him. He then rolls left, lowers a shoulder, running over the engaging defender and dragging three Owls into the end zone.
The play, a bread-and-butter set of PSU's scheme, used a combination of motion (Brackett's shift), deception (Green and Williams in the backfield) and misdirection (Williams streaking wide and short to force the release of Brackett).
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