Very possible hold. Hard to tell for sure from the only view I could find but I'm still looking. Here it is.
https://youtu.be/5wHM85WHUN0
This is good for a discussion on keys. On every play there are 5 eligible receivers and 5 wing and deep officials. So they each key on one receiver at the snap and then switch if necessary as the play develops. On all plays the field judge and side judge (deep sideline officials) have the widest guys on their side. The formation is balanced with two set eligibles on either side. In that case the back judge takes the inside guy on the line judge (near) sideline. The linesman (far LOS official) has the inside guy on his side (#87). The line judge will have the back who ends up in motion.
Once the motion starts though the key will be based on which side of the snapper he's on. None of these receivers are pressed so these 5 officials will actually start with a tackle on their side to read pass/run. In this case you have a run read based on the initial movement of the tackles (if you played defense you probably did the same thing). Based on the blocking and the initial movement of the back the point of attack becomes the wide side of the left tackle.
The H is going to come off his initial key and go to the motion guy (#18). The back judge should then switch and pick up the first guy coming downfield on that side but not the widest guy. That means he should pick up the block by #87. Depending on when he gets there he may not see the entire thing but that shouldn't be an issue here. At the B22 at the 0:03 mark the TE is now definitely beat and should be very suspect. We call this "the player with the brick in his hand."
From this angle I can't tell for sure if 87 does grab the defender or the defender just took a bad initial angle and adjusted too late. The end zone view here would be helpful. For the back judge though if he had that same question because he couldn't tell for sure he's going to pass. You don't want to guess. It happens and it usually gets you in trouble. The downgrade for an incorrect call is bigger than the downgrade for an incorrect no call.
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