Yes. There is no way for us to see galaxies move or rotate in real-time. The process takes millions of years, and in a single human lifetime, you cannot see any motion what so ever. The computer animations are more than that. They are actual simulations of how millions of 'test stars' react under the force of gravity during encounters between galaxies. These simulations are not artist renditions, but are believed to be as close as we can get to what actually occurs in nature based on the known laws of physics.