VAST video error codes enable the JW Player to report more specific details back to the ad servers when ads don’t serve properly.
The player uses the <Error> element to provide this feedback. This element is typically nested within the <InLine> or <Wrapper> element of the VAST response. In turn, an <Error> element includes a URI that provides a tracking resource for the error. This error-tracking resource is called when the video player is unable to display the Ad.