For your consideration ...
I'm not sure they were wearing NVG's. If they were, and if anyone here has ever worn them knows, it is impossible to miss any bright lights as they pretty much will blind you. With too much light, the screen become saturated limiting what can be seen. And in the area they were flying, if wearing NVG's, there would have been a whole lot of lights that would have pretty much made those NVG's worthless.
NVG's are typically worn when flying in areas where there is no, or very low, light conditions. In addition, all lights are typically off on the helo for NVG night flying.
Also, head motion is a constant when flying a helicopter, NVG or no NVG, especially when flying low. And, NVG's do have a wide field of view when using WFOV NVG, Wide Field Of View NVG's, which greatly reduce tunnel vision.