All she has to do is say, "I never knew it meant that. That's horrible! Now I know I'll never use it again; I've taken down the vlog and will repost an edited version so that my usage of this horrible slur doesn't contribute to anyone's trauma. Thank you for telling me. I am so sorry, and I've learned a great lesson today. Thank you for helping me be better, community!" That's it. But she won't because her narcissistic personality disorder will not allow her to admit fault. Which also means she will never improve, grow and learn. Again, it isn't IF she'll have another moment like this, it's WHEN.