People in the comments on her video are saying that "everyone makes mistakes". I'm sorry but I don't buy it. A mistake is forgetting your mask when you pop out to Tesco, not having party after party, and actively choosing to go out to bars and restaurants with people outside of your support bubble. I think what's hurt people the most is the hypocrisy - She constantly preached about how important it was to follow rules, posted videos showing people congregating outside of her building and calling them out on it, and was sad that she was spending Christmas alone, yet behaves as if those same rules don't apply to her.
Rachel keeps saying that she's "so so so sorry" for what she did and that the party wasn't supposed to happen. Okay, so she might not have been the one to let those people into the flat (even though she probably shouldn't have been there in the first place), but she still made a choice to stay there. She blames the fact that she was drunk and "caught in the moment", so I can only hope that she does some serious reflection and considers her life choices. If alcohol causes you to behave in a way that is reckless, dangerous, and illegal, then it's probably time you cut back.
Sorry for sounding like such an old woman, but it's people like her and her friends that give young people a bad reputation when most twenty-somethings I've encountered are quite the opposite and would do everything and anything to keep others safe and get life back to normal.