.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_15 {
	margin: 0px 0px 50px 0px;
}

#stacks_in_19 {
	margin: 50px 0px 50px 0px;
}
.youtube-wrapper.stacks_in_18{padding-top:calc((/)*100%)}

#stacks_in_21 {
	border: solid rgba(38, 0, 95, 1.00);
	border-width:  1px;
	margin: 100px 0px 0px 0px;
}