I see him charging her and shoving her back into the corner where he can get ahold of her and put her down on the ground for control. The “punches” do not appear to be very powerful to me because of the weird angle that they are thrown from. Perhaps some martial artist can talk about that.
I have become very skeptical of videos that are do not have context.
The fact that this young woman had no serious injuries indicates to me that he did not “drive her head into the wall”, and did not “punch her in the head”. If he had “punched her in the head” with any force while her face was in contact with the concrete, he would have likely broken facial bones or teeth, or at the minimum, caused severe bruising. My guess is that he hit her between the shoulder blades.
West Virginia Man Charged with Assault after Farting on Officer; September 29, 2008