Time traveller caught on film?

Irish filmmaker, George Clarke, noticed a peculiar scene on a clip from the DVD extras of Charlie Chaplin's movie, The Circus. The clip in question features what appears to be a large woman talking into a device in her hand that  many people think is a mobile phone or a walkie talkie. Since the video is originally from 1928 it as caused quite a stir and has gone viral over the Internet.

Take a look for yourself and see what you think.