Yeah, I can't even really hear the whole word in the linked video, to be honest, but that sounds like a "hard r" to me... scrolls the thread yeah she definitely didn't say "nigga."
Well cool_dude85 claims it is a racist slur, when the reality is that it can be a racist slur, which I would argue (and you seem to agree) is not the same thing.
The context being the video in that linked article? Certainly wasn't enough context for me to make such a determination. I have no idea if she was using that word to talk about black people in general, her black friends, her white friends, herself, or something else entirely. Much less if it was being used in a derogatory manner.