This is a video por a member on Youtube, who adapted it from what most people believe happened to Kopa a fictional and non-canon character from the non-disney libros "Six New Adventures".
Kiara, Simba's headstrong daughter, meets an outlander named Kovu. Simba does not approve of Kovu because he knows Kovu was trained to follow in Scar's path. Now, Kovu's mom, Zira wants to take over Pride Rock.