Here are some of my thoughts on this play from an NFHS perspective (I don't work NFL or NCAA rules and so can't speak to them):
(1) There is no effort to avoid contact with the kicker - if anything, he's headed to the kicker first, makes a feeble last-second swipe at the ball with his hand, and executes a beautiful cross-body block that is straight out of pro wrestling. Were it a live play, this would be RTK regardless of whether or not he touched the ball.
(2) Offsides is not automatically a dead-ball foul in the NFL, but it still seems like a very late whistle (nothing audible until AFTER he's already made the hit!). I would expect that we would have one much faster at our level.
(3) Given (1) above, there's really no debate, but I think even without that judgment we should have a DB PF here. He takes three steps before the snap (even if he's focused on the ball, he's got to see it arrive and know he's WAY early) and then four more steps before he hits the kicker.
(4) I find the combination of (1) and (3) sufficient to support a flagrant foul and DQ here. I know that was never going to happen in the NFL. I'm not certain I would make that call in real time. But from the comfort of my desk, I find this a pretty egregious hit that merits watching the rest of the game from the bench.
(5) Despite the trainer being on the field, it does not appear that the potential injury to the kicker delayed the ready-for-play (they hadn't even announced the foul yet) or caused the clock to stop. So under NFHS rules, I see no reason for the kicker to need to come out.
(6) Most of the time, we don't have a visible play clock, so we would never have a DoG foul on the fourth-down attempt; even if it did, it wouldn't have started until the RFP, which wouldn't happen until after the U was out of the way. I believe both Anderson and Blandino have already acknowledged that the play clock should have been reset.