Okay...three freaky things I noticed (okay, looking at Hellary makes it four), from the vid links you posted....
In first and last vid, all ‘participants’, er, folks in audience seem to be holding up their smart phone/devices at the exact same level. The devices even look the same (like Galaxy’s in first, maybe iPhones in third vid)....are they handed out to all of these ‘actors’, beforehand? I noticed this in one of her other ‘events’, but can’t remember which one.
In the second vid....Hellary seems to be sucking on her tongue, a lot, while watching Kaine speak.
Probably sucking on a cough drop.