public function buildMessage()
    {
        if (!empty($this->message)) {
            return $this->message;
        }

        $video = [
            'type' => MessageType::VIDEO,
            'originalContentUrl' => $this->originalContentUrl,
            'previewImageUrl' => $this->previewImageUrl,
        ];

        if ($this->quickReply) {
            $video['quickReply'] = $this->quickReply->buildQuickReply();
        }

        $this->message[] = $video;

        return $this->message;
    }