I have always believed that digital media play an important role in the development of modern society. For countries, large databases can help preserve history, and they can be used to teach more people about science and culture in the form of videos and photographs. That’s the value of documentaries. These precious videos and photos are easier to preserve and distribute than paper books. For individuals, videos and photos can help people better document their lives. For example, it’s like I don’t remember what I looked like or did when I was a kid, but my parents can show me pictures of me when I was a kid to help me to see the things I couldn’t remember.