If you listen to the voice over from the charming female lead it clearly states that the footage of the red necks was the last thing downloaded by the foolish film maker.
This means that it had to have been downloaded when they were at the hospitality of the guys holed up with the guns who gave them the supplies.
This of course took place while miss Texas was still alive.
So for it to be here she would have had to drive till day break (the footage is the day) get tide up and shot and the red necks would beam the footage into the past for the film maker to down load it. And dye her hair.
Your point about red necks in general is well taken, howerver (with the exception of Hank Hill).