answer: just the one guy in the blue shirt .
question: how many people are in the video ?
answer: no he enters the frame from the left side .
question: can he be seen when the video begins or does he enter ?
answer: it looks like he 's near a staircase . i think there is a fire door behind him .
question: what room is he in ?
answer: first , he messes with his cell phone .
question: what does he do after he enters ?
answer: yeah , after a few seconds he sneezes twice . you can also hear his footfalls .
question: can you hear sound ?
answer: after he messes with his phone he sneezes into his shirt sleeve twice .
question: what does he do after he messes with his cell phone ?