插入 dplayer 标签 demo

文档：https://www.u2sb.com/pages/7105db/

示例 1

{% mmedia "dplayer" "url:/assets/video/s_720.mp4" %}

## 示例 2

{% mmedias "dplayer" %}
{
  video: 
  {
    url: "/assets/video/s_720.mp4"
  }
}
{% endmmedias %}