Each second has a story. At age 30, Cesar Kuriyama started recording one second of his life every day. He'll do it for the rest of his life, through a new app. He think you should too, "When I turn 40, I'll have a 1-hour video that encapsulates my 30s. If I live to see 80 years of age, I'll have a 5-hour video that summarizes 50 years of my life."