Ok, well I watched the video...
I think it's meant to explicitly/specifically show the fine line between ok and not ok. The video shows a situation where a guy and girl end up in the bedroom where a consensual sexual encounter is about to occur. So after a bit there is some escalation where the sex gets rough, the guy hits her and she asks for more. He hits her again and then he grabs her in a way that she says it hurts. The situation escalates further and the guy gets more aggressive, and uses what seems to be excessive force to the point where the girl starts saying stop.
The guy doesn't stop when she says to, and I guess that is the part that speaks out about rape culture and other victims of rape. She gave content for most of the actions that took place, but there was a point where what the guy did was beyond her boundaries. She said stop and the guy didn't acknowledge he plea, because she was asking for more a moment before. I think that's the point where out society has the issue, the guy might say that he had consent, but the girl wants the guy to know that she might become not ok with certain things, and he shouldn't use physical force to do it anyway.