<div class="videos-container" id="app">
  <div class="video-player">
    <video-frame :source="current"></video-frame>
  </div>
  <div class="video-choices">
    <video-thumbnails :movies="movies" v-on:choose-movie="handleChangeCurrent"></video-thumbnails>
  </div>
</div>
body {
  background: #1e3c72;
  background: linear-gradient(to right, #1e3c72, #2a5298);
  padding: 30px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.videos-container {
  background: #333;
  padding: 10px;
  box-shadow: 0 0 50px 5px rgba(0, 0, 0, 0.25);
  color: #FFF;
}

.video-player   {
  min-height: 300px;
  width: 100%;
  background: #000;
  margin-bottom: 10px;
}

.video-choices  {
  display: flex;
  
  :not(:last-child) {
    margin-right: 5px;
  }
  
  img {
    height: 100px;
  }  
}
.poster{
    float: left;
 }
.thumbnails{
  display: flex;
  justify-content: left;
}
View Compiled
// the movies you can use from this API
const videoTag = {
  template: `
    <iframe
            allowFullScreen
            frameborder="0"
            height="376"                       :src="source.trailer"
              style="width: 100%; min-width: 750px"
            />
`,
  props: ['source']
};

const thumbnail = {
  template: `
  <div class="thumbnails">
 <div v-for="movie in movies">
    <div class="poster" @click="changeCurrent(movie)">
      <img :src="movie.poster" height="200"alt="">
    </div>
  </div>
  </div>
`,
  props: ["movies"],
  methods: {
    changeCurrent(movie) {
      this.$emit('choose-movie', movie)
    }
  }
};

var app = new Vue({
  el: "#app",
  components: {
    "video-frame": videoTag,
    "video-thumbnails": thumbnail
  },
  data() {
    return {
      api: "https://scotch-mvplayer-api.herokuapp.com/api/v1",
      movies: [],
      current: null
    };
  },
  created() {
    axios.get(this.api).then(res => {
      this.movies = res.data;
      this.current = this.movies[0]
    });
  },
  methods: {
    handleChangeCurrent(movie) {
      this.current = movie
    }
  }
});

// HAVE FUN! USE WHATEVER TOOL YOU WANT!

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/axios/0.18.0/axios.js
  2. https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.3/vue.js