I’ve never seen a US airline allow a stroller in the cabin. They always have to be left at the end of the jetway and you carry the child from there. (Rules seemed to be a bit more relaxed in more free countries such as Russia)
So if she rolled the stroller right on to the plane, I can see the stewardess taking it away from her.
Yes, but violently taking it and in the process hitting mom and nearly hitting the baby?
There are 2 eyewitness accounts to back that version up - the statement quoted by the lady who began filming, and the passenger on the tape.