<script type="text/javascript" src="https://unpkg.com/vue"></script>
<script type="text/javascript" src="https://unpkg.com/youtube-vue"></script>

<div id="app">
    <div>
        <youtube-vue :videoid="video_id" :loop="loop" :autoplay="autoplay" />
    </div>
</div>
......
<script type="text/javascript">
    new Vue({
        el : "#app",
        data : {
            video_id:"PABUl_EX_hw", loop:0, autoplay:1
        }
    })
</script>
......

npm install --save youtube-vue
- or -
yarn add youtube-vue

<template>
  <div>
    <div>
      video_id : <input type="text" v-model="temp.video_id" /><br />
      loop : <input type="number" v-model.number="temp.loop" /><br />
      <button @click="applyConfig">Apply</button>
      <button @click="playCurrentVideo">Play</button>
      <button @click="stopCurrentVideo">Stop</button>
      <button @click="pauseCurrentVideo">Pause</button>
    </div>
    <YoutubeVue
      ref="youtube"
      :videoid="play.video_id"
      :loop="play.loop"
      :width="480"
      :height="320"
      :modestbranding="1"
      :controls="1"
      @ended="onEnded"
      @paused="onPaused"
      @played="onPlayed"
    />
  </div>
</template>

export default {
  name: "App",
  data() {
    return {
      temp: { video_id: "3P1CnWI62Ik", loop: 1 },
      play: { video_id: "3P1CnWI62Ik", loop: 1 },
    };
  },
  components: {
    YoutubeVue,
  },
  methods: {
    applyConfig() {
      this.play = Object.assign(this.play, this.temp);
    },
    playCurrentVideo() {
      this.$refs.youtube.player.playVideo();
    },
    stopCurrentVideo() {
      this.$refs.youtube.player.stopVideo();
    },
    pauseCurrentVideo() {
      this.$refs.youtube.player.pauseVideo();
    },
    onEnded() {
      console.log("## OnEnded");
      this.$refs.youtube.player.playVideo();
    },
    onPaused() {
      console.log("## OnPaused");
    },
    onPlayed() {
      console.log("## OnPlayed");
    },
  },
};
</script>