Dinosaurs’ origins, video

This 27 July 2018 video says about itself:

How Dinosaurs Took Over The World

Dinosaurs were the true kings of the Jurassic and Cretaceous periods. For millions of years, Velociraptor, T-Rex, and your other favorites reigned supreme. But they weren’t always on top. At first, dinos were only the size of a dog, after all. Here’s how dinosaurs conquered the world.