The reference is to the practice of animal sacrifice in the Jewish Temple, where thousands of animals were ritually slaughtered every year as offerings to God, the meat being shared with the Priests.
They listen to the videos as students from other cities share their stories of how their reckless driving affected not only their lives but also those of their passengers.
There's a video-sharing ability, by which you can watch videos with other people, though your interactions are limited to a chatroom besides the video.
Although the American Academy of Pediatrics offers guidelines recommending that parents model appropriate social media use for their children, it does not explicitly discuss oversharing by parents.