.one-third {
	width:29%;
	float:left;
	margin:2%;	
}
.video_frame {
	width:98% !important;
}
.example-image {
	display:block;
	max-width:100%;
	height:auto;
	width:auto;
	margin-bottom:-4px;
	-webkit-filter: grayscale(100%);
	filter: grayscale(100%);
}
.example-image:hover {
	opacity: .8;
}
@media screen and (max-width: 850px) {
	.one-third {
		width:48%;
		margin:1%;
	}
}
@media screen and (max-width: 650px) {
	.one-third {
		width:98%;
		margin:1%;
	}
}