Grounded videos are GoAnimate videos about a troublemaker getting grounded. It is a famous type of video on GoAnimate.
The golden rule about grounded videos: the less effort you put into your (grounded/GoAnimate) videos, the more famous you get. See Louie Louie 95.
Sometimes, the troublemakers of grounded videos are UTTP members, and Alvin Hung just because he did updates on his site.