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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                <div class="grid-row reverse video-gallery">
 <input type="radio" value="1" name="video-list" id="video-1" checked="checked" /><label for="video-1">Option 1</label>
 <input type="radio" value="2" name="video-list" id="video-2" /><label for="video-2">Option 2</label>
 <input type="radio" value="3" name="video-list" id="video-3" /><label for="video-3">Option 3</label>
 <input type="radio" value="4" name="video-list" id="video-4" /><label for="video-4">Option 4</label>
 <input type="radio" value="5" name="video-list" id="video-5" /><label for="video-5">Option 5</label>
 <input type="radio" value="6" name="video-list" id="video-6" /><label for="video-6">Option 6</label>
 <!-- videos -->
 <div class="video video-1">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/ROqDTIxRX0Y" frameborder="0" allowfullscreen></iframe>
 </div>

 <div class="video video-2">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/9iGoDNlKY-g" frameborder="0" allowfullscreen></iframe>
 </div>

 <div class="video video-3">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/l70UhhNalqA" frameborder="0" allowfullscreen></iframe>
 </div>

 <div class="video video-4">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/XDrB5c4-c9Y" frameborder="0" allowfullscreen></iframe>
 </div>

 <div class="video video-5">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/UXP307MGQzs" frameborder="0" allowfullscreen></iframe>
 </div>

 <div class="video video-6">
  <iframe width="560" height="315" src="https://www.youtube.com/embed/0kY0Q5hdjDI" frameborder="0" allowfullscreen></iframe>
 </div>
 <!-- videos -->
</div>
              
            
!

CSS

              
                *
	box-sizing: border-box

html
	height: 100%
	overflow: hidden
	width: 100%

body
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif
	font-size: 16px
	height: auto
	line-height: 1
	overflow-x: hidden
	padding: 2rem
	width: 100%

//everything above here is just for pretties

.video
	position: relative
	padding-top: 4.1%
	padding-bottom: 51.95%
	height: 0
	iframe
		position: absolute
		top: 0
		left: 0
		height: 100%
		width: 100%
		min-height: 0

.video-gallery
	margin-top: 3em
	position: relative
	width: 100%
	.video
		animation: 1200ms fadeOut ease
		animation-fill-mode: both
		//display: none
		grid-column-start: 1
		grid-row-start: 1
		grid-row-end: 7
		//height: 0
		max-height: 19.5em
		opacity: 0
		transition: all 300ms ease
	input[type="radio"]
		font-size: 0
		height: 0
		opacity: 0
		padding: 0
		position: fixed
		width: 0
	input
		grid-column-start: 1
		grid-row-start: 1
	label
		color: #000000
		font-size: 1.25em
		font-weight: 400 
		grid-column-start: 2
		margin: 0 !important
		padding: 1rem 0 1rem 3rem
		position: relative
		border-bottom: 1px solid #CCCCCC
		&:last-of-type
			border: 0 none
	input[type="radio"]:checked+label
		color: #E41F35 !important
		&:before
			content: "▶"
			left: 0
			top: 12px
			position: absolute





.grid-row
	display: block
	height: 56vw
	max-height: 19.5em
	position: relative
	label
		left: calc(50% + 16px)
		position: relative
		width: calc(50% - 16px)
	.video
		padding: 0
		position: absolute
		top: 0
		width: 0
	&:after
		content: ""
		clear: both
		display: table

#video-1:checked ~ .video-1, #video-2:checked ~ .video-2, #video-3:checked ~ .video-3, #video-4:checked ~ .video-4, #video-5:checked ~ .video-5, #video-6:checked ~ .video-6
	animation: 1200ms fadeIn ease
	animation-fill-mode: both
	//display: block
	//height: 56vw
	opacity: 1
	width: 50%




@keyframes fadeOut
	0%
		display: block
		height: 56vw
		opacity: 1
		width: 50%
	25%
		display: block
		height: 56vw
		opacity: 1
		width: 50%
	49%
		display: block
		height: 56vw
		opacity: 0
		width: 50%
	50%
		display: none
		height: 0
		opacity: 0
		width: 0

@keyframes fadeIn
	0%
		opacity: 0
		width: 0
	49%
		display: none
		height: 0
		opacity: 0
		width: 0
	50%
		display: block
		height: 56vw
		opacity: 0
		width: 50%
	100%
		display: block
		height: 56vw
		opacity: 1
		width: 50%





@supports(display: grid)
	.grid-row
		align-items: start
		display: grid
		grid-column-gap: 16px
		grid-row-gap: 0
		grid-template-columns: 1fr 1fr
		grid-template-rows: 1fr 1fr 1fr 1fr 1fr 1fr
		label
			left: auto
			width: 100%
		.video
			position: relative
			width: 100%
		#video-1:checked ~ .video-1, #video-2:checked ~ .video-2, #video-3:checked ~ .video-3, #video-4:checked ~ .video-4, #video-5:checked ~ .video-5, #video-6:checked ~ .video-6
		width: 100%
	@keyframes fadeOut
		0%
			display: block
			height: 56vw
			opacity: 1
			width: 100%
		25%
			display: block
			height: 56vw
			opacity: 1
			width: 100%
		49%
			display: block
			height: 56vw
			opacity: 0
			width: 100%
		50%
			display: none
			height: 0
			opacity: 0
			width: 0

	@keyframes fadeIn
		0%
			opacity: 0
			width: 0
		49%
			display: none
			height: 0
			opacity: 0
			width: 0
		50%
			display: block
			height: 56vw
			opacity: 0
			width: 100%
		100%
			display: block
			height: 56vw
			opacity: 1
			width: 100%





@media (max-width: 767px)
	.video-gallery
		display: flex
		flex-direction: column
		height: auto
		max-height: none
		label
			left: auto
			order: 2
			width: 100%
		.video
			order: 1
			padding-top: 4.1%
			padding-bottom: 51.95%
			position: relative
			top: auto
			width: 100%

	#video-1:checked ~ .video-1, #video-2:checked ~ .video-2, #video-3:checked ~ .video-3, #video-4:checked ~ .video-4, #video-5:checked ~ .video-5, #video-6:checked ~ .video-6
		width: 100%

	@keyframes fadeOut
		0%
			display: block
			height: 56vw
			opacity: 1
		25%
			display: block
			height: 56vw
			opacity: 1
		49%
			display: block
			height: 56vw
			opacity: 0
		50%
			display: none
			height: 0
			opacity: 0

	@keyframes fadeIn
		0%
			opacity: 0
		49%
			display: none
			height: 0
			opacity: 0
		50%
			display: block
			height: 56vw
			opacity: 0
		100%
			display: block
			height: 56vw
			opacity: 1
              
            
!

JS

              
                //What are you looking here for?
              
            
!
999px

Console