Assalam Alaikum,
Yes I agree with dawoodi, you need to watch the full thing to understand. you see when the girl finally takes off the hijab (astaghfirullah, poor thing) she goes into the classroom, and everyone is sooooo diverse, and it's kinda like you see the anger and frustration inside as she looks around, because everyone is getting to display their uniqueness and also more importantly, there is a guy wearing a baseball hat, and a couple girls wearing some pretty large head bands that kinda look like a small hijab, but because they are non muslims, it isn't a problem. Inshallah you will understand this point when you watch the video, although I do understand that you may have misinterpreted it, as if one does not watch to the end, it kinda seems like the video is sanctioning the idea of just removing the hijab because "it's not a big deal" kind a thing. Hope that clears something up.