.col-lg-3, .img-fluid { position: relative; }


 .col-lg-3 .play-btn{width:50px;
           position: absolute; 
           top: 30%;
           left: 44%;
           cursor: pointer;
           transition: 0.5s;
           opacity:0;
         
                       

}




.col-lg-3:hover .play-btn{opacity:1;}

.container p{font-size: 22px; }