.container,.video,img{width:100%}*{box-sizing:border-box}body{margin:0;padding:0}.row{display:flex;padding:5px;flex-wrap:wrap}.column{flex:25%;padding:5px}.column img{margin-top:5px}@media (max-width:800px){.column{flex:50%}}@media (max-width:600px){.column{flex:100%}}.container{display:flex;position:relative;height:0;padding-bottom:56.25%;margin-top:2.5%}.video{position:absolute;top:0;left:0;height:100%}