FYI you need to have a Vet come there & do an inlay sound to see how many puppies she has inside. Reason being must make sure All puppies come out.
And don’t want any unborn puppy left inside.
Since Cora is crying you need to make sure she not having a problem with contractions.

Cora is in labor right now I think. Crying alone in the barn, looking for her spot, not hungry, relieving herself, sluggish. I sure hope you guys stay beside her throughout the delivery. She may need assistance or just the comfort you bring to her being there. I have been through many cat and dog births and every single one of them delivered after dark. All the moms came to me when it was “time” About half of them needed assistance, and the only one I wasn’t present for ended up dying after giving birth, and only 1 puppy survived(mama bled to death). I pray all goes well.

I think a suggestion? Dogs don’t normally have hay or straw available, it’s not natural to them for having puppies, perhaps inside the box, some clean towels or another type of flat, clean bedding that isn’t straw/pokey. Even shavings are better than straw for a dog. You notice on at least 2 videos she’s digging to try to move the straw away since the natural birth would be on the ground or a flat stone in a cave/den. They would also pull fur to line the base, so a towel or some blankets. You disturbed her nest by putting more straw over it.