It is a clip created by audience editing all the loving scenes together for the two couples. The great thing about lighting is that I see the actor/actress's face in the way their beloved one sees.
Like the scene the Colonel Brandon with the eagle, his face was shining and his all figure is tall with charm. It is seen by Marianne. The light on his face has perfectly shown the handsomeness of him.
Both girls are beautiful because they are in love and their faces are enlightened by the lov