human: <image>
How many people are there in the video?

gpt: Only one person in the video.

human: Was he in there from the beginning?

gpt: Yes, he is in the video at the start.

human: What he did at first?

gpt: He picks up a sweater from the stairs and puts it on.

human: Then what he did?

gpt: He picked up a plastic bag.

human: Waht he did afterward?

gpt: He walked up the stairs.