The video shows a diagram of a plant with a sun in the background. The sun is shining light energy onto the plant, which is absorbed by the chloroplasts in the plant's leaves. The energy is then used to convert carbon dioxide and water into glucose, which is stored as food for the plant. The diagram is colorful, with the sun in yellow, the leaves in green, and the glucose in blue. The diagram is labeled with arrows and text to explain the process.