The video “A Valuable Lesson For A Happier Life” illustrates how a teacher explains to his students with a clear example, how prioritizing the essentials can lead us to a more satisfying life, where he uses a jar that represents our life, golf balls that represent the important things like our family, the stones represent things a little less important, a car, a house, a job, the sand represents the small and not so important things and the beer represents that even though we are busy in our lives there is always time and space to go out to clear our heads, relax and enjoy. 

In conclusion, the video emphasizes the importance of identifying and prioritizing what really matters in life, and that happiness does not come from material things but from meaningful experiences and relationships.