Illegal forward pass. Tough play to get, though. In theory, the wing on that side (L, in this case) would be holding at the NZ, since the R is on that side of the holder (H would drop back to help cover the blocked kick). In this case, the L got off the line pretty well (not 'textbook' but potentially fortuitous, in this case), and appears very close, if not right on, the spot of the pass when it happens. Pass is released about the B-28 1/2, and hits the ground about the B-30 1/2, then picked up by B30. (BTW - ain't no way this is a fumble - its a pass, ladies and gentlemen. And he wasn't down before he released the pass, either.) L gets a bean bag down about the 30 1/2. Then everyone are off to the races.
If the H had dropped back at the snap and hustled, he should have been able to rule on the pass. We've seen tougher plays ruled successfully by the off-side guy. (BTW, the R 'shouldn't' be able to help - he should be leading the action down the field with a good five-to-fifteen yard leading cushion.)
If the L dropped his BB to further process the play before deciding pass or fumble, he could have come back and ruled an IFP, even after the play (although the BB should have been dropped at the spot of the pass, not the spot where B30 picked up the ball). Since it was a try, the spot of the pass would have been moot, since the LOD provision of the penalty would have ended the try (with the score canceled).
If the L dropped his BB because he was ruling fumble, well, aside from being incorrect, he missed the spot by two yards. Again, the spot would have been moot, in this case.
This would have been a tough play for any crew. Even if the crew is experienced in mechanics for a crew of 7, the H may not be accustomed to dropping back (at the snap) to help on a blocked kick, so he may not be there to help rule on the IFP.
Just goes to show that we have to focused and prepared on every play.