The video is linked in the article, it's not long. I'm a fan of Bari's, but the fact she doesn't include it anywhere in her analysis is absolutely damning as far as her bias is concerned in my opinion. It is the single objective piece of evidence we have of what happened. The only thing where we don't have to rely on Amy or Christian's honest or memory. And she barely touches on it except to say "it looks bad."
As for whether we should give credence to Amy's words, that hinges on whether you think somebody who we know without doubt (even Amy admitted this) lied to the police about the events in the park, and who has every single motivation to lie now, to redeem her public image, is trustworthy. I don't think she is.
But more to the point, I just see no way whatsoever to look at her behaviour in the video and believe she was in fear for her life. Absolutely none. YMMV of course.