The obvious tell is the unnaturally dark outer borders of her clothes and a more faded appearance of the background. I suspect it’s two separate videos with different color saturation levels, where she was cut out of one and over layed onto the other to make it appear she actually has a crowd.
It’s pathetic photography for a pathetic old hag.
Still, it's obviously a Hillary rally, with the sign "Stronger Together". And someone is clearly speaking at the rally, given the supporters' reactions.
I can’t post the photos directly because they’re Getty images.
Hillary Clinton’s Coconut Creek, Florida Rally
October 25, 2016