Apparently it upset people because the video only mentions the girl's clothing policy, and not the boys.
If you acknowledge that boys and girls are different, people get offended.
Today my school was shown this video. So sad how ONLY girls are shown as the violators. I understand why my school has a dresscode, but what about the boys who wear shorts, or show their shoulders? It’s 2018...Why are we still over-sexualizing teen girls? pic.twitter.com/fCXymYAIEG— cat (@catmoring) August 16, 2018