protected function getVideoClicksDomElement()
    {
        // create container
        if (!empty($this->videoClicksDomElement)) {
            return $this->videoClicksDomElement;
        }
        
        $this->videoClicksDomElement = $this->linearCreativeDomElement->getElementsByTagName('VideoClicks')->item(0);
        if (!empty($this->videoClicksDomElement)) {
            return $this->videoClicksDomElement;
        }
        
        $this->videoClicksDomElement = $this->linearCreativeDomElement->ownerDocument->createElement('VideoClicks');
        $this->linearCreativeDomElement->firstChild->appendChild($this->videoClicksDomElement);
        
        return $this->videoClicksDomElement;
    }