Continuity mistake: There is a scene when King Arthur is just starting the Round Table. All the knights are gathered and bow on their knees to Arthur and King Pelinor who ceremoniously holds the sword Excalibur. But King Pelinor doesn't arrive in Camelot until after the following scene (which is May Day). (00:37:00)
Continuity mistake: In the garden where Lancelot and Guinevere secretly meet, Guinevere has a ring which she wears on the upper joint of her finger. It vanishes halfway through the scene.
King Arthur: By God, I shall be a king. This is the time of King Arthur. When we shall - reach for the stars! This is the time of King Arthur when violence is not strength and compassion is not weakness.