Funny you should ask that. There is no mandatory disqualification for targeting in high school like there is in NCAA. However, a targeting foul where contact is initiated with a helmet above the shoulders of a defenseless player can be a candidate for a flagrant foul, resulting in disqualification.
I was the observer on this game, and I discussed this very question with the crew after the game. After a thorough discussion, we all agreed that the hit, although there was a lot of contact, should not have been considered “flagrant.” So, IMO the crew got it exactly right … except the Referee gave the personal foul signal (#38), but omitted the signal for targeting (#24).