Here's a description of the video: The video shows a woman, wearing a grey long-sleeve shirt, dark pants, and glasses, instructing two men in a park on how to use a surveyor's instrument. The instrument is mounted on a yellow tripod. The tripod has the words "CHENAV" printed on its legs. The woman gestures toward the instrument while speaking. The two men are listening to her. One man is wearing a striped orange and white shirt with jeans, and the other is wearing a black hoodie and black sandals. The background consists of green trees and wet pavement. The sky appears overcast.