Every classification system has false positives and false negatives. Just because something is blocked, doesn't mean it's objectionable. And it especially doesn

Every classification system has false positives and false negatives. Just because something is blocked, doesn't mean it's objectionable. And it especially doesn't mean that the person who created the video is objectionable. The alternatives are: schools completely block youtube, preventing kids from getting a lot of information, including LGBT information. Or creating an opt-in restricted mode that will inevitably have false positives, blocking kids from seeing some portion of the information. At least in the second case kids have access to a portion of the LGBT information.