As many posters have stated already, we don’t really know what transpired prior to the video being shot, but that mother definitely has a large red welt or injury on her forehead. I’m just going to throw this out there, although it’s a bit unkind. That flight attendant looks and sounds as if he is gay. I’ve been noticing more and more that the male attendants are gay, or at least effect gay mannerisms and speech. (Yes, I am stereotyping a bit here). Perhaps they are just effeminate. Why are gays always so hateful?
I think he was the gate agent and nota flight attendant.