Whitecloud is exploding upwards when he hits Knies in the chin. He doesn’t jump, but he’s early in exploding through the hit and that contributes to this being a head shot.
The obvious difference between this and the Reaves hit is that Reaves hits Nurse’s head as the principal point of contact and gets very little body. Whitecloud catches Knies completely square. Contact can start with the head if the player is hitting the body, which is the case here. This is a clean hit.
If the DoPS is going to look at this, it will be for the early upwards motion leading to the head contact. The DoPS are clowns and they are absolutely biased against us, that’s not just a meme, but a blind squirrel finds a nut every now and then.