接口插槽怎么获取插槽template里面的元素节点

比如我想获取video的context，获取不到

<template v-slot="{item,current}">  
        <div class="car-video-box">  
          <image class="cover-img" v-if="item.id !== current.id" :src="item.coverImgUrl"></image>  
          <video  
            v-else  
            class="video-car"  
            id="myVideo"  
            :autoplay="true"  
            :item="item"  
            :loop="true"  
            :src="item.videoUrl"  
            :show-play-btn="false"  
            :show-center-play-btn="false"  
            :enable-progress-gesture="false"  
            :show-fullscreen-btn="false"  
            object-fit="contain"  
            @tap.self="pauseVideo(item.id)"  
          />  
          <footer class="btn-group">  
            <button class="left-btn" @tap.self="goPage(1)">预约试驾</button>  
            <button class="right-btn" @tap.self="goPage(2)">立即订购</button>  
          </footer>  
          <detail-aside :contantItem="item" @getCommentInfo="getCommentInfo" />  
          <div class="pause-btn" v-if="item.currentPauseBtnShow" @click="handleClicked(contantIndex)">  
            <img src="https://new-rtl-1258960627.cos.ap-beijing.myqcloud.com/haval_weapp/icon_play.png" alt="暂停按钮加载错误">  
          </div>  
        </div>  
      </template>