It may have already been posted but just in case others are looking it's here:
Jodi Arias Trial - Jennifer Willmott Motioning to Witness? - YouTube
For what it's worth, I don't think Wilmott is 'signalling'.
Look how her suit sleeve is tight with her blouse sleeve bunched up underneath it. I think her quick arm streching movement was done because she realised her suit jacket was so tight she wasn't going to be able to get her hand to the top of her fluffy little head without loosening it, hence the rapid 'shake out' of her sleeve.
(Sorry if this has been pointed out in the 20 pages intervening between your and mine!)
The TH's on HLN thought she was.