She does indeed love to look at herself perform. She could not take her eyes off of herself today, and as my wife noted, her emotions mirrored those she was witnessing herself perform on the screen. She cried only when she saw herself doing it in the tape, not in response to dialog cues. That's been her pattern throughout the trial as well. When "normal" people might be expected to react to the mention of the possibility of their young (now deceased) child drowning, for example, she shows no interest beyond a perpetually annoyed pout; yet, given the opportunity to see or hear others speaking about her and her reactions,she tends to respond appropriately.
All too familiar, unfortunately, to those of us unfortunate enough to have endured narcissists in our lives. Thank goodness I cannot claim that any of them are sociopathic to the degree this young woman clearly is.