父组件：在组件中写一个ref="",

@click.native="click"  // 点击事件

<template>
  <div class="container">
    <child  @click.native="click" ref="child"></child>
  </div>
</template>
<script>
  import child from '@/components/videoChild'
export default {
  name: 'app',
  components: {
    child
  },
  methods: {
   	click () {
   	    this.$refs.child.pauseVideo()  //过this.$refs.ref.method调用
   	}
  }
    
}
</script>

子组件：

pauseVideo () {  console.log（1）}