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HTML

              
                
<body class="page">
	<div class="video"> 
    
		<a class="video__link" href="https://www.youtube.com/watch?v=c7EukUo_kR4">
			<picture>
				<source srcset="https://i.ytimg.com/vi_webp/c7EukUo_kR4/maxresdefault.webp" type="image/webp">
				<img class="video__media" src="https://i.ytimg.com/vi/c7EukUo_kR4/maxresdefault.jpg" alt="test video">
			</picture>
		</a>
		<button class="video__button" aria-label="Play video">
			<svg width="68" height="48" viewBox="0 0 68 48"><path class="video__button-shape" d="M66.52,7.74c-0.78-2.93-2.49-5.41-5.42-6.19C55.79,.13,34,0,34,0S12.21,.13,6.9,1.55 C3.97,2.33,2.27,4.81,1.48,7.74C0.06,13.05,0,24,0,24s0.06,10.95,1.48,16.26c0.78,2.93,2.49,5.41,5.42,6.19 C12.21,47.87,34,48,34,48s21.79-0.13,27.1-1.55c2.93-0.78,4.64-3.26,5.42-6.19C67.94,34.95,68,24,68,24S67.94,13.05,66.52,7.74z"></path><path class="video__button-icon" d="M 45,24 27,14 27,34"></path></svg>
		</button>
	</div>
  </body>
              
            
!

CSS

              
                .page {
	margin: 0;
	display: grid;
	grid-template-columns: 1fr 1fr;
	grid-gap: 20px;
}

.video {
	position: relative;
	width: 100%;
	height: 0;
	padding-bottom: 56.25%;
	background-color: #000000;
}

.video__link {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.video__media {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	border: none;
}

.video__button {
	position: absolute;
	top: 50%;
	left: 50%;
	z-index: 1;
	display: none;
	padding: 0;
	width: 68px;
	height: 48px;
	border: none;
	background-color: transparent;
	transform: translate(-50%, -50%);
	cursor: pointer;
}

.video__button-shape {
	fill: #212121;
	fill-opacity: 0.8;
}

.video__button-icon {
	fill: #ffffff;
}

.video__button:focus {
	outline: none;
}

.video:hover .video__button-shape,
.video__button:focus .video__button-shape {
	fill: #ff0000;
	fill-opacity: 1;
}

/* Enabled */

.video--enabled {
	cursor: pointer;
}

.video--enabled .video__button {
	display: block;
}
              
            
!

JS

              
                function addVideosToPage(videoWrapperClass, linkClass, imageClass, buttonClass, enabledClass){
	function findVideos() {
		//take all videos
		let videos = document.querySelectorAll(videoWrapperClass);
		//run functions for each video on the page
		for (let i = 0; i < videos.length; i++) {
			setupVideo(videos[i]);
		}
	}

	function setupVideo(video) {
		//link to video
		let link = video.querySelector(linkClass);
		//video preview
		let media = video.querySelector(imageClass);
		//play button
		let button = video.querySelector(buttonClass);
		//parse id of video from url of image in current videowrapper
		let id = parseMediaURL(media);

		//add creating iframe instead of videolink by clicking videowrapper
		video.addEventListener('click', () => {
			//create iframe
			let iframe = createIframe(id);
			//revome link
			link.remove();
			//remove button
			button.remove();
			//place iframe inside the videowrapper
			video.appendChild(iframe);
		});

		//remove href from link to make the link just as container
		link.removeAttribute('href');
		//add class that shows our youtube button
		video.classList.add(enabledClass.replace('.', ''));
	}

	//pasrse video ID from img's url
	function parseMediaURL(media) {
		let regexp = /https:\/\/i\.ytimg\.com\/vi\/([a-zA-Z0-9_-]+)\/maxresdefault\.jpg/i;
		let url = media.src;
		let match = url.match(regexp);

		return match[1];
	}

	//creating iframe
	function createIframe(id) {
		let iframe = document.createElement('iframe');
		iframe.setAttribute('allowfullscreen', '');
		iframe.setAttribute('allow', 'autoplay');
		iframe.setAttribute('src', generateURL(id));
		iframe.classList.add(imageClass.replace('.', ''));

		return iframe;
	}
	//generating url for iframe
	function generateURL(id) {
		let query = '?rel=0&showinfo=0&autoplay=1';

		return 'https://www.youtube.com/embed/' + id + query;
	}

	findVideos();
}

addVideosToPage('.video', '.video__link', '.video__media', '.video__button', '.video--enabled');
              
            
!
999px

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