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

获取用户发送过来的视频的MediaId，再通过该视频的MediaId把视频发送给用户，为什么公众号上显示“该公众号提供的服务出现故障，请稍后再试”，发送的参数已经根据文档的格式填写。

下面是接收的参数

Array(

    [data] => Array(

            [ToUserName] => gh_7771708b79ad

            [FromUserName] => oo-KM5277XBlWWFbrk1Y1e8o5KQs

            [CreateTime] => 1661585632

            [MsgType] => video

            [MediaId] => vTGx4hJHrHOA0mhqUwPcEbeEygKfYcqUnTw13rgzWUlhTFXySAxm9Llp9cFtZMzth1H2YKX3EHdppO0WlBtZUQ

            [ThumbMediaId] => vTGx4hJHrHOA0mhqUwPcEY9V-c-vNIynHzRcDb0anPDu470Bl8aJB3UsWGAXlyPz

            [MsgId] => 23788185749794471

        )

    [err_code] => 0

)

下面是发送的参数

<?xml version="1.0" encoding="UTF-8"?>

<xml>

  <ToUserName>oo-KM5277XBlWWFbrk1Y1e8o5KQs</ToUserName>

  <FromUserName>gh_7771708b79ad</FromUserName>

  <CreateTime>1661585629</CreateTime>

  <MsgType>video</MsgType>

  <Video>

    <MediaId>vTGx4hJHrHOA0mhqUwPcEbeEygKfYcqUnTw13rgzWUlhTFXySAxm9Llp9cFtZMzth1H2YKX3EHdppO0WlBtZUQ</MediaId>

    <Title>11</Title>

    <Description>22</Description>

  </Video>

</xml>