JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
	<div class="container with-curtain">
		<svg class="playa thePlay" width="100%" height="100%" viewBox="0 0 64 64">
			<path d="M25.6,46.4L44.8,32L25.6,17.6V46.4z M32,0C14.3,0,0,14.3,0,32s14.3,32,32,32s32-14.3,32-32S49.7,0,32,0z
      M32,57.6C17.9,57.6,6.4,46.1,6.4,32S17.9,6.4,32,6.4S57.6,17.9,57.6,32S46.1,57.6,32,57.6z" />
		</svg>
		<div class="inner-container curtain curtain1">
			<div class="ratio-keeper">
				<div class="wrapa">
					<div class="video video-frame"></div>
				</div>
				<div class="panel-left"></div>
				<div class="panel-right"></div>
			</div>
		</div>
	</div>

	<div class="container with-curtain">
		<svg class="playb thePlay " width="100%" height="100%" viewBox="0 0 64 64">
			<path d="M25.6,46.4L44.8,32L25.6,17.6V46.4z M32,0C14.3,0,0,14.3,0,32s14.3,32,32,32s32-14.3,32-32S49.7,0,32,0z
      M32,57.6C17.9,57.6,6.4,46.1,6.4,32S17.9,6.4,32,6.4S57.6,17.9,57.6,32S46.1,57.6,32,57.6z" />
		</svg>
		<div class="inner-container curtain curtain2">
			<div class="ratio-keeper">
				<div class="wrapa">
					<div class="video video-frame"></div>
				</div>
				<div class="panel-left"></div>
				<div class="panel-right"></div>
			</div>
		</div>
	</div>

	<div class="container with-curtain">
		<svg class="playc thePlay " width="100%" height="100%" viewBox="0 0 64 64">
			<path d="M25.6,46.4L44.8,32L25.6,17.6V46.4z M32,0C14.3,0,0,14.3,0,32s14.3,32,32,32s32-14.3,32-32S49.7,0,32,0z
      M32,57.6C17.9,57.6,6.4,46.1,6.4,32S17.9,6.4,32,6.4S57.6,17.9,57.6,32S46.1,57.6,32,57.6z" />
		</svg>
		<div class="inner-container curtain curtain3">
			<div class="ratio-keeper">
				<div class="wrapa">
					<div class="video video-frame" data-id="qe5WF4qCSkQ"></div>
				</div>
				<div class="panel-left"></div>
				<div class="panel-right"></div>
			</div>
		</div>
	</div>
</div>

CSS

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  background: #353198;
  animation: fade 2s ease 0s forwards;
}
@keyframes fade {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}
.outer {
  display: flex;
  min-height: 100%;
  box-sizing: border-box;
  justify-content: center;
}
.container {
  display: flex;
  justify-content: center;
}
.container.active {
  flex: 1 0 0;
  animation: fadebody 5s ease 0s forwards;
  background-size: 165px 165px;
  background-image: linear-gradient(teal 5px, #0000 5px),
    linear-gradient(90deg, teal 5px, #0000 5px),
    linear-gradient(black 10px, #0000 10px 160px, black 160px),
    linear-gradient(90deg, black 10px, #0000 10px 160px, black 160px),
    linear-gradient(orange 15px, #0000 15px 155px, orange 155px),
    linear-gradient(90deg, orange 15px, #0000 15px 155px, orange 155px),
    linear-gradient(black 20px, #0000 20px 150px, black 150px),
    linear-gradient(90deg, black 20px, #0000 20px 150px, black 150px),
    linear-gradient(teal 25px, #0000 25px 145px, teal 145px),
    linear-gradient(90deg, teal 25px, #0000 25px 145px, teal 145px),
    linear-gradient(black 30px, #0000 30px 140px, black 140px),
    linear-gradient(90deg, black 30px, #0000 30px 140px, black 140px),
    linear-gradient(orange 35px, #0000 35px 135px, orange 135px),
    linear-gradient(90deg, orange 35px, #0000 35px 135px, orange 135px),
    linear-gradient(black 40px, #0000 40px 130px, black 130px),
    linear-gradient(90deg, black 40px, #0000 40px 130px, black 130px),
    linear-gradient(teal 45px, #0000 45px 125px, teal 125px),
    linear-gradient(90deg, teal 45px, #0000 45px 125px, teal 125px),
    linear-gradient(black 50px, #0000 50px 120px, black 120px),
    linear-gradient(90deg, black 50px, #0000 50px 120px, black 120px),
    linear-gradient(orange 55px, #0000 55px 115px, orange 115px),
    linear-gradient(90deg, orange 55px, #0000 55px 115px, orange 115px),
    linear-gradient(black 60px, #0000 60px 110px, black...

JavaScript

const manageCover = (function makeManageCover() {
    const config = {};

    function show(el) {
        el.classList.remove("hide");
    }

    function hide(el) {
        el.classList.add("hide");
    }

    function hideAll(elements) {
        elements.forEach(hide);
    }

    function showCovers(playButton) {
        const cover = playButton.parentElement;
        cover.classList.add("active");
        show(cover);
    }

    function coverClickHandler(evt) {
        hideAll(config.containers);
        const cover = evt.currentTarget;
        showCovers(cover);
    }

    function addClickToButtons(playButtons) {
        playButtons.forEach(function addEventHandler(playButton) {
            playButton.addEventListener("click", coverClickHandler);
        });
    }

    function addCoverHandler(coverSelector, handler) {
        const cover = document.querySelector(coverSelector);
        cover.addEventListener("click", handler);
    }

    function init(selectors) {
        config.containers = document.querySelectorAll(selectors.container);
        const playButtons = document.querySelectorAll(selectors.playButton);
        addClickToButtons(playButtons);
    }

    return {
        addCoverHandler,
        init,
        show
    };
}());

function combinePlayerOptions(playerOptions1 = {}, playerOptions2 = {}) {
    const combined = Object.assign({}, playerOptions1, playerOptions2);
    Object.keys(playerOptions1).forEach(function checkObjects(prop) {
        if (typeof playerOptions1[prop] === "object") {
            combined[prop] = Object.assign(
                {},
                playerOptions1[prop],
                playerOptions2[prop]
            );
        }
    });
    return combined;
}

const videoPlayer = (function makeVideoPlayer() {
    const players = [];

    const tag = document.createElement("script");
    tag.src = "https://www.youtube.com/player_api";
    const firstScriptTag = document.getElementsByTagName("script")[0];
   ...