路径: 微信官方文档->公众号->消息管理->客服消息->发送视频消息

链接: https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Service_Center_messages.html

文档中的要求发送格式如下:

 {
    "touser":"OPENID",
    "msgtype":"video",
    "video":
    {
      "media_id":"MEDIA_ID",
      "thumb_media_id":"MEDIA_ID",
      "title":"TITLE",
      "description":"DESCRIPTION"
    }
}

问题: thumb_media_id对应的缩略图不显示