.owl-item a{ display:block; background-repeat:no-repeat; background-position:50% 50%; background-size:cover; position:relative; overflow: hidden;}
.owl-item a img{width:100%;}
.owl-item a video ,
.owl-item a iframe {position:absolute;left:0;
top:0;
width:100%;
height:100%;transform: scale(1.4);
}