They were both pointed roughly west. And the Cargo Law cam was located north of the video location. This is enough information to determine from the pics that the target was traveling east.
What is the actual time this webcam took that pic?
5:16 pm, within minutes of when the video was taken...unless you think Cargo Law is in on the conspiracy...
How can you determine the direction of whatever is pictured there since it is a still pic?
Since the contrail shows position over time, all you need is two still pictures from two unique locations to determine direction unambiguously. It's called triangulation.
This case is closed. You just don't realize it.
What was the location of the Sky2 helicopter since you seem to know it?