The video showcases a group of animated dinosaurs, including a large T-Rex, a long-necked dinosaur, and a few other smaller dinosaurs, all of which are swimming in a body of water. The setting appears to be a desert-like environment with red rock formations and sparse vegetation. The water is calm, and the sky is clear blue. The dinosaurs are rendered in a realistic style, with detailed textures and lifelike movements. The T-Rex is the largest of the group, with a distinctive sharp-toothed smile and a powerful build. The long-necked dinosaur has a long, slender neck and a small head, while the other dinosaurs have varying sizes and features.