Speculation has been rampant. Perhaps the woman is simply mad and talking happily to herself or perhaps she really is from the future
Belfast filmmaker, George Clarke's, video has gone viral and he still believes that a time traveler is the most likely explanation for the strange figure, who appears to be speaking on a cellphone in Charlie Chaplin's 1928 "The Circus" footage.
However people, amongst the millions who have seen the video, believe that this woman is actually using a hearing aid. Back in 1924 Siemens invented a hearing aid that was a "compact, pocket sized carbon microphone/amplifier device." Look under history on their website and see the proof.
Stranger things have happened...unlike time travelers.