The guys here are all free ranging.
They certainly do cry out at night, especially now, during the breeding season.
(yes, it is the sound in that video, whatever you call that sound).
This does not seem to indicate that they are under attack, but that they sense predators nearby.
The hens nest on the ground, and these guys in the trees are their warning system.
You're right, nathhowe, it can be very alarming!
Especially now...one of the hens here has three chicks that are too young to get high up in their tree.
So they are roosting on a low branch (= vulnerable to predators).
Hearing that cry at night is frightening...
Happy to see that there are still three chicks in the morning...