iframe{max-width:100%}
.singlevideolist {display:flex;flex-wrap:wrap;justify-content:space-around;}
.singlevideolist li {max-width:48%;text-align:center;margin-bottom:30px;}
.singlevideolist li p {margin-top:8px;}
@media (max-width:768px){.singlevideolist li{width:100%;max-width:100%}
.singlevideolist li iframe{width:100%;height:400px}}
@media (max-width:500px){.singlevideolist li iframe{height:280px}}