If I misunderstand her question,I will consider more again. She asked "how much do you prepare when you talk with friends by web cam at late night." She didn't ask "which is better choice,only voice call or video call?"Why is the question chaged? There are many kind of people in the world,some of them like using web cam to talk,some of them don't like. I can recognize any opinions and ideas.I think both sides have advantage and disadvantage.Anyway I reply to her question, I don't accept to use web cam at night time, I can accept it at day time if I feel ok. I think you are a good person, you should refuse it at late night time. If you can't refuse it, you should take care your appearance because it is manner.