In a medieval castle shrouded in morning mist, the sun rises and knights gather outside the castle. Deep strings build to a crescendo, foreshadowing the battle to come. Please help me generate a two-minute video based on the above conversation. The story background of the video is in the Middle Ages. It requires grandeur, epic battle scenes, and a sense of reality. The video screen is 16:9, ultra-detailed, and video style. It is 3D Animation seed, realistic, seed is 113