The camera isn't that special and it is widely used. As for the motivation of what is going on behind the camera and it's operator I can not speculate. The camera in question is 73m or 239ft from the target given it's vantage point and it is higher then target as well...but I will speculate it is from a stationary security camera remotely observed, as for no warning, what kind of warning could be sent out that made sense? Beware of the thing I can see but but you can not? But the operator tracked it as it was seen in real time so it wasn't like they were unaware of it's presence...time will tell what it is all about.

Edit: Added info...reviewed video again...early on lower right corner 003 degrees and 3.5km...video could be taken from a heli or fixed wing aircraft. If true it would complicate raising an alarm as well.

The camera isn't that special and it is widely used. As for the motivation of what is going on behind the camera and it's operator I can not speculate. The camera in question is 73m or 239ft from the target given it's vantage point and it is higher then target as well...but I will speculate it is from a stationary security camera remotely observed, as for no warning, what kind of warning could be sent out that made sense? Beware of the thing I can see but but you can not? But the operator tracked it as it was seen in real time so it wasn't like they were unaware of it's presence...time will tell what it is all about.