<header>
  <h1>SITE TITLE</h1>
  <nav>
    <ul>
      <li><a href="#">HOME</a></li>
      <li><a href="#">ABOUT</a></li>
      <li><a href="#">SERVICES</a></li>
      <li><a href="#">CONTACT</a></li>
    </ul>
  </nav>
</header>
<section class="main-slider">
  <div class="item image">
    <span class="loading">Loading...</span>
    <figure>
      <div class="slide-image slide-media" style="background-image:url('https://images.unsplash.com/photo-1617339847756-976edbc411e7?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTE4Mg&ixlib=rb-1.2.1&q=85');">
        <img data-lazy="https://images.unsplash.com/photo-1617339847756-976edbc411e7?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTE4Mg&ixlib=rb-1.2.1&q=85" class="image-entity" />
      </div>
      <figcaption class="caption">Static Image</figcaption>
    </figure>
  </div>
  <div class="item vimeo" data-video-start="4">
    <iframe class="embed-player slide-media" src="https://player.vimeo.com/video/78430027?api=1&byline=0&portrait=0&title=0&background=1&mute=1&loop=1&autoplay=0&id=78430027" width="980" height="520" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
    <p class="caption">Vimeo</p>
  </div>
  <div class="item image">
    <figure>
      <div class="slide-image slide-media" style="background-image:url('https://images.unsplash.com/photo-1485178575877-1a13bf489dfe?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTIwOQ&ixlib=rb-1.2.1&q=85');">
        <img data-lazy="https://images.unsplash.com/photo-1485178575877-1a13bf489dfe?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTIwOQ&ixlib=rb-1.2.1&q=85" class="image-entity" />
      </div>
      <figcaption class="caption">Static Image</figcaption>
    </figure>
  </div>
  <div class="item youtube">
    <iframe class="embed-player slide-media" width="980" height="520" src="https://www.youtube.com/embed/QV5EXOFcdrQ?enablejsapi=1&controls=0&fs=0&iv_load_policy=3&rel=0&showinfo=0&loop=1&playlist=QV5EXOFcdrQ&start=1" frameborder="0" allowfullscreen></iframe> 
    <p class="caption">YouTube</p>
  </div>
  <div class="item image">
    <figure>
      <div class="slide-image slide-media" style="background-image:url('https://images.unsplash.com/photo-1483555714914-20a74b6e45f5?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTIwOQ&ixlib=rb-1.2.1&q=85');">
        <img data-lazy="https://drive.google.com/uc?export=view&id=0B_koKn2rKOkLSlBkWDBsWXJNazQ" class="image-entity" />
      </div>
      <figcaption class="caption">Static Image</figcaption>
    </figure>
  </div>
  <div class="item video">
    <video class="slide-video slide-media" loop muted preload="metadata" poster="https://images.unsplash.com/photo-1483555714914-20a74b6e45f5?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0MzA4MTIwOQ&ixlib=rb-1.2.1&q=85">
      <source src="https://player.vimeo.com/external/138504815.sd.mp4?s=8a71ff38f08ec81efe50d35915afd426765a7526&profile_id=112" type="video/mp4" />
    </video>
    <p class="caption">HTML 5 Video</p>
  </div>
</section>
<section class="container">
  <div class="content">
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Suscipit veniam quisquam, rem illum dicta cumque, voluptate fugiat impedit beatae rerum ratione, voluptates nisi magni delectus ab, eaque atque iste. Molestias incidunt nemo veniam alias nam nisi distinctio optio error architecto odit! Illo dicta nulla fugiat distinctio laudantium, corrupti eum unde.</p>

    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Suscipit veniam quisquam, rem illum dicta cumque, voluptate fugiat impedit beatae rerum ratione, voluptates nisi magni delectus ab, eaque atque iste. Molestias incidunt nemo veniam alias nam nisi distinctio optio error architecto odit! Illo dicta nulla fugiat distinctio laudantium, corrupti eum unde. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Suscipit veniam quisquam, rem illum dicta cumque, voluptate fugiat impedit beatae rerum ratione, voluptates nisi magni delectus ab, eaque atque iste. Molestias incidunt nemo veniam alias nam nisi distinctio optio error architecto odit! Illo dicta nulla fugiat distinctio laudantium, corrupti eum unde.</p>
  </div>
</section>

$fonts: Arial, "Hiragino Kaku Gothic Pro W3", Meiryo, sans-serif;
$bg_color: #2d3042;
$font_color: #efefef;
$link_color: #efefef;
$link_hover_color: #fff;

*, *:before, *:after {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
  font-family: $fonts;
  background-color: $bg_color;
  position: relative;
  color: $font_color;
  text-align: center;
  a, a:visited {
    color: $link_color;
    text-decoration: none;
  }
  a:hover {
    color: $link_hover_color;
  }
}
%bv_hidden {
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
%filled_obj {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  padding: 0 5%;
  text-align: left;
  z-index: 1;
  h1 {
    display: inline-block;
    font-size: 22px;
    font-weight: bold;
    padding-top: 18px;
  }
  nav {
    display: inline-block;
    float: right;
    ul {
      li {
        display: inline-block;
        vertical-align: top;
        font-size: 13px;
        a {
          display: block;
          padding: 24px 15px;
          &:hover {
            background-color: rgba(#fff, .18);
          }
        }
      }
    }
  }
}

.main-slider {
  position: relative;
  width: 100%;
  height: 38vw;
  min-height: 8vw;
  margin-bottom: 50px;
  opacity: 0;
  visibility: hidden;
  transition:all 1.2s ease;
  &.slick-initialized {
    opacity: 1;
    visibility: visible;
  }
}
.slick-slide {
  position: relative;
  height: 38vw;
  @extend %bv_hidden;
  &::before {
    @extend %filled_obj;
    @extend %bv_hidden;
    background-color: #000;
    opacity: .3;
    z-index: 1;
  }
  video {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform:translate(-50%, -50%);
  }
  iframe {
    position: relative;
    pointer-events: none;
  }
  figure {
    position: relative;
    height: 100%;
  }
  .slide-image {
    opacity: 0;
    height: 100%;
    background-size: cover;
    background-position: center;
    // background-color:rgba(#c46897,.38);
    // background-blend-mode:overlay;
    transition:all .8s ease;
    &.show {
      opacity: 1;
    }
  }
  .image-entity {
    width: 100%;
    opacity: 0;
    visibility: hidden;
  }
  .loading {
    position: absolute;
    top: 44%;
    left: 0;
    width: 100%;
  }
  .slide-media {
    animation:slideOut .4s cubic-bezier(0.4, 0.29, 0.01, 1);
  }
  &.slick-active {
    z-index: 1;
    .slide-media {
      animation:slideIn 2.4s cubic-bezier(0.4, 0.29, 0.01, 1);
    }
    .caption {
      opacity: 1;
      transform:translateY(0);
      transition:all .7s cubic-bezier(0.32, 0.34, 0, 1.62) .6s;
    }
  }
}
.caption {
  position: absolute;
  top: 44%;
  left: 5%;
  text-align: center;
  padding: 20px;
  border: 3px solid;
  color: #fff;
  margin: 0;
  font-size: 40px;
  font-weight: bold;
  letter-spacing: .02em;
  opacity: 0;
  z-index: 1;
  transition:all .3s ease;
  transform:translateY(100px);
  @extend %bv_hidden;
}

.slick-dots {
  text-align: center;
  padding-top: 15px;
  li {
    display: inline-block;
    vertical-align: top;
    margin: 0 8px;
    button {
      width: 16px;
      height: 16px;
      border: none;
      cursor: pointer;
      border-radius: 50%;
      border: 2px solid #fff;
      box-shadow: 0 0 0 0 transparent;
      vertical-align: middle;
      color: #fff;
      background-color: #fff;
      transition:all .3s ease;
      opacity: .4;
      &:focus {
        outline: none;
      }
      &:hover {
        opacity: 1;
      }
    }
    &.slick-active {
      button {
        border-color: $bg_color;
        box-shadow: 0 0 0 2px #fff;
        opacity: 1;
      }
    }
  }
}

.container {
  background-color: #f2f2f2;
  color: #444;
  line-height: 1.6;
  padding: 40px 0;
  .content {
    width: 90%;
    max-width: 980px;
    margin: 0 auto;
  }
  p {
    margin-bottom: 40px;
  }
}

@keyframes slideIn {
  from {
    filter:blur(15px);
  }
  to {
    filter:blur(0);
  }
}
@keyframes slideOut {
  from {
    filter:blur(0);
  }
  to {
    filter:blur(15px);
  }
}

const slideWrapper = $(".main-slider"),
    iframes = slideWrapper.find('.embed-player'),
    lazyImages = slideWrapper.find('.slide-image');
let lazyCounter = 0;

// POST commands to YouTube or Vimeo API
const postMessageToPlayer = (player, command) =>{
  if (player == null || command == null) return;
  player.contentWindow.postMessage(JSON.stringify(command), "*");
}

// When the slide is changing
const playPauseVideo = (slick, control) => {
  let currentSlide, slideType, startTime, player, video;

  currentSlide = slick.find(".slick-current");
  slideType = currentSlide.attr("class").split(" ")[1];
  player = currentSlide.find("iframe").get(0);
  startTime = currentSlide.data("video-start");

  if (slideType === "vimeo") {
    switch (control) {
      case "play":
        if ((startTime != null && startTime > 0 ) && !currentSlide.hasClass('started')) {
          currentSlide.addClass('started');
          postMessageToPlayer(player, {
            "method": "setCurrentTime",
            "value" : startTime
          });
        }
        postMessageToPlayer(player, {
          "method": "play",
          "value" : 1
        });
        break;
      case "pause":
        postMessageToPlayer(player, {
          "method": "pause",
          "value": 1
        });
        break;
    }
  } else if (slideType === "youtube") {
    switch (control) {
      case "play":
        postMessageToPlayer(player, {
          "event": "command",
          "func": "mute"
        });
        postMessageToPlayer(player, {
          "event": "command",
          "func": "playVideo"
        });
        break;
      case "pause":
        postMessageToPlayer(player, {
          "event": "command",
          "func": "pauseVideo"
        });
        break;
    }
  } else if (slideType === "video") {
    video = currentSlide.children("video").get(0);
    if (video != null) {
      if (control === "play"){
        video.play();
      } else {
        video.pause();
      }
    }
  }
}

// Resize player
const resizePlayer = (iframes, ratio) => {
  if (!iframes[0]) return;
  var win = $(".main-slider"),
      width = win.width(),
      playerWidth,
      height = win.height(),
      playerHeight,
      ratio = ratio || 16/9;

  iframes.each(function(){
    let current = $(this);
    if (width / ratio < height) {
      playerWidth = Math.ceil(height * ratio);
      current.width(playerWidth).height(height).css({
        left: (width - playerWidth) / 2,
         top: 0
        });
    } else {
      playerHeight = Math.ceil(width / ratio);
      current.width(width).height(playerHeight).css({
        left: 0,
        top: (height - playerHeight) / 2
      });
    }
  });
}

// DOM Ready
$(function() {
  // Initialize
  slideWrapper.on("init", function(slick){
    slick = $(slick.currentTarget);
    setTimeout(function(){
      playPauseVideo(slick,"play");
    }, 1000);
    resizePlayer(iframes, 16/9);
  });
  slideWrapper.on("beforeChange", function(event, slick) {
    slick = $(slick.$slider);
    playPauseVideo(slick,"pause");
  });
  slideWrapper.on("afterChange", function(event, slick) {
    slick = $(slick.$slider);
    playPauseVideo(slick,"play");
  });
  slideWrapper.on("lazyLoaded", function(event, slick, image, imageSource) {
    lazyCounter++;
    if (lazyCounter === lazyImages.length){
      lazyImages.addClass('show');
      // slideWrapper.slick("slickPlay");
    }
  });

  //start the slider
  slideWrapper.slick({
    // fade:true,
    autoplaySpeed:4000,
    lazyLoad:"progressive",
    speed:600,
    arrows:false,
    dots:true,
    cssEase:"cubic-bezier(0.87, 0.03, 0.41, 0.9)"
  });
});

// Resize event
$(window).on("resize.slickVideoPlayer", function(){  
  resizePlayer(iframes, 16/9);
});