We don't have a state-wide set mechanic (it can vary between associations or assignors or crews). Typically the U hands the ball to the kicker and stays behind Team A. The L has A's line, the H has B's line and the B and the R have the goal line.
But there are some guys who do what's on the video. (The R is most likely on the nearside 5yd line.) Not sure why they do it. I think they think it gives them better coverage for the return and the blocks?
I've asked them what they do if there's a pylon play across from the R and nobody's on the goal line there. No real answer.