Nope... the animated gif isolated and looped that micro second movement for amusement. You need to see the whole clip to see the expression of one ofvthe reporter’s initial reaction as the reporter draws back suddenly before Hillary utters that non-sequiter, “Have you tried the iced Chai?....”
The full video shows her eyes going into rapid blinking moment as her head nods back and forth.
All that was unintentional and uncontrolled for that very brief moment. It was as if she had a TIA (mini stroke).
Too many cut these clips so short that the context is lost, thus they seem to have little significance except to embarrass Clinton.
The larger context needs to be displayed to show how others react to ‘that moment’ she is having some kind of problem.
I found just the head bobbing segments;
first part is involuntary motions that take the reporters by surprise,
then the second part is voluntary imitation that embarrasses the reporters:
https://m.youtube.com/watch?v=YMHOcmDVBP0