@media screen and (min-width: 770px) {
.wp-ytg-div {
    display: inline-block; 
    margin: 4px; 
    width: 30%;
}
}

@media screen and (max-width: 769px) {

	.wp-ytg-div {
        display: inline-block; 
        max-width: 100%;
	}
}