It's been reported that Hillary must sleep for 14 hours a day; and thus we hardly see her publicly. I'd seen this video before on other places but I hadn't spoke of it b/c I wasn't sure that it wasn't manipulated. But now upon seeing this from multiple angles and seeing reporters reacting, it's clear to me that this woman is suffering from seizures. I won't make any conclusions for the OP about what exactly this mean. This can be an open ended discussion on the matter.
Hillary Clinton has seizure when talking to reporters
Hillary Clinton has seizure when talking to reporters