Re: I froze the video several times
She is talking, but that doesn't eliminate the "holding her hand by her head" theory. I see weird people doing things like that on the streets all the time. Holding their hands on top of their head or something. For all we know she has a little dolly in that hand that she's talking to.
When the alternative is a time traveler trying to use a cell phone in 1925, Occam's Razor provides a multitude of solutions.