Of course I dont think it was correct for the FA to hit her, but I didnt see that on the video. The male passenger says the FA almost hit her in the head, so I dont know if she did or not.
I think the guy said you almost hit/hurt a baby, not the woman. That seems to be established.
I will not trust my life to a stewardess who cannot control his temper.
I'd also demand a full refund, and name this stewardess as the reason.
I'd also encourage as many of my fellow pax as I can to follow me.