In the video, a man is seen in a workshop filled with various tools. He is wearing a black t-shirt with the word "TESTED" written in red letters. The man is holding a long white tube in his hand and is blowing air into it. As he blows, a blue light appears at the end of the tube, indicating that the tube is filled with a substance that reacts to air pressure. The man continues to blow into the tube, and the blue light becomes more intense. The workshop is well-lit, and the tools in the background are neatly arranged. The man appears to be focused on the tube and the reaction it produces.