How can I make Kaltura play VPAID js file?

@jess

thanks, I've read docs and implemented the solution (pls see below). But ad does not play. I have checked it in another player and it works. But with Kaltura it does not. Can you please take a look and help? really appreciate your time.

P.S. In a console (DevTools Chrome) no exceptions are seen.
flashvars: {

        "vast": {
            "prerollUrl" :  "http://localhost:8080/vpaidjs.xml"
        }

}