The video starts with a yellow background and a dinosaur running across the screen. The dinosaur is brown and has sharp teeth. The background then changes to a red color, and the dinosaur is now in a desert-like setting with palm trees and mountains in the background. The word "GRETACEOUS" appears in large white letters, and underneath it, the text "145-65 mya" is displayed. The dinosaur continues to run across the screen, and the background remains the same.