The Video describes a metaphor to illustrate the value of something once it is taken away. It imagines a drowning man falling deeper into the ocean, and asks what the value of that one last breath of air would be. Just as the drowning man would suddenly realize the true value of air once he can no longer breathe, the video is telling that we often take things for granted in life, like breathing, without realizing their value until they are gone. It notes how we receive things like air and eyesight freely throughout our lives without thinking about their worth.