This is almost nightly here. Forget the video, nothing was happening. It's all in the audio. The coyotes, and their den, aren't more than say... 1000' away from my house.
I don't know . . . maybe check the nearest cemetery and be sure there isn't something else going on. Take a mirror, cross, garlic, some silver bullets, and a wooden stake or two just in case.
I have seen people almost loose their mind hearing Coyotes in the woods have never hearing them before.