Once Upon Little
He bit down the guy's neck, at first the guy screamed and yelled, he called William a bloodsucker, but William made him shut up in the most aggressive way possible, he bit him down on the neck and the guy went yellow, then pale, and then paler until he fell down on the ground, William had a bit of blood left on his lips, he wiped those off and smiled to the camera, all of his teeth especially the canine had a red tint left on them.
"Now that we made things clear, we are vampires, we drink blood to stay alive, but we won't hurt you, humans, we don't want to eat you alive, we don't want to hurt you, but you should know and see what we can do," he explains, we all believed him now.