When I first watched it I noticed her eyes and thought maybe they looked like that from crying or lack of sleep. It does look like her right eye (our left) may be a little dark - but I think it is just a shadow. Not sure.
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I see how it could be viewed as a black eye but it also looks like mine can after a serious lack of sleep and/or in bad light. IMO if it is/was a black eye it's faint and already pretty well on the way to healing. I think it would've looked much worse a day or two before, unlikely to have been missed since she's been seen and on TV etc. so much.