If this was neurological she would not have the balance that she has in the video; in other wodrs she would be running into the wall, or misstepping here and there which she is not doing.
Her behavior is very repetitive and sheit looksas if she is responding to something that you cannot hear.
Ithink of 2 things ...one of them is whether ,despite the fighting, she is wanting to be reunited to the bun she was bonded with and is listeningfor the other rabbit ; she appears to be listening to or for something
if I separated a bonded pair and placed them separated this is how one of the separated ones may behave
She looks very much as if she is an animal 'pacing " in a cage.
if she is behaving this way outside the cage it definitely is not normal but I , at this point do nt know what it is