Because the original was THAT bad. Did in-game music, timing, and SFX. I felt like other featured videos just slapped music on it and fans were so turned off from the original that ANYTHING ELSE was better. (Kanye, I gotchu. gonna make this better by removing you from it.). Disclaimer: I own nothing in this video. This is just an example of what this video game deserves for a movie trailer. Music:. "Assassin's Creed Main Theme" by Lorne Balfe. "Ezio's Family" by Jesper Kyd.