answer: yes , there is only one person in the video .
question: is there just one person in the video ?
answer: it is a man in the clip .
question: and is that a man or a woman ?
answer: after he walks in , he remains there .
question: is he in the room the whole time ?
answer: no , he comes in through a different door .
question: does he come in through the front door ?
answer: yes , he is holding a glass when he walks in .
question: is he holding something in his hand ?
answer: he takes two sips of the drink .
question: does he take a drink ?