Watching unhealthy videos is not a bad boy. Bad boy is a Chinese word to describe a bad boy. Bad is an adjective, and children are nouns. This word is often used to describe bad children, such as playing truant and internet cafes, which is mostly derogatory. It is also used to describe children who are independent and rebellious, and it is mostly a compliment. There are many definitions of bad children, which can't be judged by just some videos.