Teaching and learning of foreign language does not require only to acquire certain amount of words, phrases or speaking at certain level. Body language is extremly important and it goes along with spoken language. Foreigner who speaks target language will be understood and accepted by natives much better if such pesron shows certain level of body language. Expression of respect, or love varies from language to language. For example when I try to say to my wife "I love you" in English, I really do not feel much of love, and perhaps I do not show it neither. This URL is very valuable for those who learn language using media or through colborative learning. Along with learning of pronunciation of sounds, phrases, or speaking at any level, these video clips show what body language goes with spoken language.
I have feeling that some of characters are a little bit shay in front of cameras, which significantly decreases their natural performances.