callToActionCreative.setDisplayUrl("www.example.com/mars");
callToActionCreative.setDestinationUrl("www.example.com/mars");
callToAction.setCreative(callToActionCreative);
videoCallToAction.setCallToAction(callToAction);
VideoCallToActionOperation operation = new VideoCallToActionOperation();
operation.setOperand(videoCallToAction);
// Use SET to add a new Call to Action, or to overwrite an existing one.
operation.setOperator(Operator.SET);
VideoCallToActionOperation[] operations = new VideoCallToActionOperation[] {operation};
// Add video call to action.
VideoReturnValue result = videoService.mutateCallToAction(operations);