Two philosophies are in conflict here. First is the desire to construe formations liberally to keep them legal. Myself, I've never thrown a flag for a mugwump yet. When the widest man is questionably staggered, as in this video, I make him a back if the next man is an eligible number, or an end if the next man is (as in this video) number 73. Making him an end makes this formation legal.
The second philosophy is that trick formations should carry a higher degree of scrutiny, and if there's ever a time to rule a mugwump, a trick formation is that time.
But the H is punching the widest man back, which he presumably wouldn't do if he deemed the man a mugwump.
I suppose there's a good chance I might punch back the questionably staggered man out of habit whenever the second widest man is that far wide. Since 99% of the time, only eligible numbers line up out there, I might neglect to check his number. That may be what happened here.