.youtube-wrapper{width:100%;padding-top:56.25%;position:relative}.youtube-wrapper > .fluid-width-video-wrapper,.youtube-wrapper > iframe{position:absolute;top:0;left:0;width:100%}.youtube-wrapper > iframe{height:100%}

#stacks_in_478 {
	margin: 0px 0px 10px 0px;
}

#stacks_in_481 {
	margin: 0px 0px 20px 0px;
}

#stacks_in_416 {
	margin: 0px 0px 20px 0px;
}
.youtube-wrapper.stacks_in_415{padding-top:calc((/)*100%)}