In the video, a man is standing in front of a blackboard and writing a mathematical equation. He starts by writing the equation and then proceeds to explain it. The man is wearing a gray shirt and has curly hair. The blackboard has the equation written in white chalk, and the man is using a piece of white chalk to write and explain the equation. The man appears to be in a classroom setting, and he seems to be teaching a lesson on the equation he has written.