First off, we'd like to preface this by saying that CrossFit is an intense workout, and the girl squatting this much weight is extremely impressive.
However, we have a few questions: Instead of filming, why wasn't the cameraman spotting her? Or why wasn't she using a squat rack? These are fantastic questions that we likely won't learn the answer to.
We assume she's ok though, because the video was posted on her YouTube account.