Can you explain me?

	🔍

.lazyframe{position:relative;background-color:currentColor;background-repeat:no-repeat;background-size:cover}.lazyframe__title{position:absolute;top:0;right:0;left:0;padding:15px 17px;z-index:3}.lazyframe__title::after{z-index:-1}.lazyframe:hover{cursor:pointer}.lazyframe::before{display:block;content:"";width:100%;padding-top:100%}.lazyframe[data-ratio="16:9"]::before{padding-top:56.25%}.lazyframe[data-ratio="4:3"]::before{padding-top:75%}.lazyframe[data-ratio="1:1"]::before{padding-top:100%}.lazyframe iframe{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;width:100%;height:100%}.lazyframe[data-vendor="youtube"],.lazyframe[data-vendor="youtube_nocookie"]{background-color:#e52d27;font-family:Roboto, Arial, Helvetica, sans-serif}.lazyframe[data-vendor="youtube"] .lazyframe__title,.lazyframe[data-vendor="youtube_nocookie"] .lazyframe__title{color:#eee;font-family:Roboto, Arial, Helvetica, sans-serif;font-size:18px;text-shadow:rgba(0,0,0,0.498039) 0 0 2px;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:rgba(0,0,0,0);transition:color 0.1s cubic-bezier(0.4, 0, 1, 1)}.lazyframe[data-vendor="youtube"] .lazyframe__title:hover,.lazyframe[data-vendor="youtube_nocookie"] .lazyframe__title:hover{color:#fff}.lazyframe[data-vendor="youtube"] .lazyframe__title::before,.lazyframe[data-vendor="youtube_nocookie"] .lazyframe__title::before{content:"";display:block;background:linear-gradient(rgba(0,0,0,0.2), transparent);height:98px;width:100%;pointer-events:none;position:absolute;top:0;left:0;right:0;z-index:-1;-webkit-tap-highlight-color:rgba(0,0,0,0)}.lazyframe[data-vendor="youtube"]::before,.lazyframe[data-vendor="youtube_nocookie"]::before{padding-top:56.25%}.lazyframe[data-vendor="youtube"]::after,.lazyframe[data-vendor="youtube_nocookie"]::after{content:"";position:absolute;left:50%;top:50%;width:68px;height:48px;margin-left:-34px;margin-top:-24px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='%231F1F1F' d='M255.7 446.3c-53.3.3-106.6-.4-159.8-3.3-17.4-1-34.7-2.5-50.4-11C35 426.3 27 418.4 22 407.2 13.2 388.6 10.5 369 9 349c-3.4-41.3-3.6-82.6-1.8-123.8 1-22 1.6-44 6.8-65.5 2-8.4 5-16.6 8.8-24.4C32 117 48 108 67.3 104c16.2-3 32.8-3 49.3-3.7 56-2.3 112-3.5 168-3 43 .6 86.2 1.7 129.3 4 13.2.6 26.6.8 39.3 5.5 17.2 6.4 30 17.2 37 34.7 6.6 16.8 9.2 34.2 10.6 52 3.8 48.7 4 97.3.7 146-1 16.3-2.2 32.7-6.5 48.8-9.7 37-32.8 51.5-66.7 53.8-36.2 2.5-72.5 3.8-108.8 4.3-21.3.2-42.7 0-64 0zM203.2 344L348 264.7l-144.8-79.3V344z'/%3E%3Cpath fill='%23FEFDFD' d='M203.2 344V185.5L348 264.8 203.2 344z'/%3E%3C/svg%3E");background-position:center center;background-size:100%;background-repeat:no-repeat;opacity:.81;border:none;z-index:4}.lazyframe[data-vendor="youtube"]:hover::after,.lazyframe[data-vendor="youtube_nocookie"]:hover::after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='%23DD2C28' d='M255.7 446.3c-53.3.3-106.6-.4-159.8-3.3-17.4-1-34.7-2.5-50.4-11C35 426.3 27 418.4 22 407.2 13.2 388.6 10.5 369 9 349c-3.4-41.3-3.6-82.6-1.8-123.8 1-22 1.6-44 6.8-65.5 2-8.4 5-16.6 8.8-24.4C32 117 48 108 67.3 104c16.2-3 32.8-3 49.3-3.7 56-2.3 112-3.5 168-3 43 .6 86.2 1.7 129.3 4 13.2.6 26.6.8 39.3 5.5 17.2 6.4 30 17.2 37 34.7 6.6 16.8 9.2 34.2 10.6 52 3.8 48.7 4 97.3.7 146-1 16.3-2.2 32.7-6.5 48.8-9.7 37-32.8 51.5-66.7 53.8-36.2 2.5-72.5 3.8-108.8 4.3-21.3.2-42.7 0-64 0zM203.2 344L348 264.7l-144.8-79.3V344z'/%3E%3Cpath fill='%23FEFDFD' d='M203.2 344V185.5L348 264.8 203.2 344z'/%3E%3C/svg%3E");opacity:1}.lazyframe[data-vendor="vimeo"]{background-color:#00adef}.lazyframe[data-vendor="vimeo"] .lazyframe__title{font-family:"Helvetica Neue", Helvetica, Arial, sans-serif;color:#00adef;font-size:20px;font-weight:700;text-rendering:optimizeLegibility;user-select:none;-webkit-font-smoothing:auto;-webkit-tap-highlight-color:rgba(0,0,0,0);background-color:rgba(0,0,0,0.5)}.lazyframe[data-vendor="vimeo"]::before{padding-top:48.25%}.lazyframe[data-vendor="vimeo"]::after{content:"";height:40px;width:65px;display:block;bottom:10px;left:10px;z-index:3;background-color:rgba(0,0,0,0.5);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' baseProfile='tiny' viewBox='0 0 24 24'%3E%3Cpath fill='%23FFF' d='M7.765 16.89l8.47-4.89-8.47-4.89'/%3E%3C/svg%3E");background-position:center center;background-size:100% 100%;background-repeat:no-repeat;border-radius:5px;position:relative}.lazyframe[data-vendor="vimeo"]:hover::after{background-color:#00adef}.lazyframe[data-vendor="vine"]{background-color:#00bf8f}.lazyframe[data-vendor="vine"] .lazyframe__title{color:#fff;font-family:"Helvetica Neue", Helvetica, Arial, sans-serif;font-size:14px;line-height:16px;white-space:nowrap;z-index:3;position:relative}.lazyframe[data-vendor="vine"] .lazyframe__title::after{content:"";position:absolute;top:0;left:0;right:0;z-index:-1;height:115px;padding:24px 70px 24px 24px;background-image:linear-gradient(to top, rgba(23,23,23,0) 0, rgba(23,23,23,0.7) 100%)}.lazyframe[data-vendor="vine"]::before{padding-top:100%}.lazyframe[data-vendor="vine"]::after{content:"";width:60px;height:60px;position:absolute;left:50%;top:50%;z-index:4;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='136' height='136' viewBox='0 0 136 136'%3E%3Cpath fill='%23FFF' d='M56 44c-.7 0-1.4.2-2 .5-1.2.8-2 2-2 3.5v40c0 1.4.8 2.8 2 3.5.6.3 1.3.5 2 .5s1.4-.2 2-.5l34.6-20c1.3-.7 2-2 2-3.5 0-1.4-.7-2.8-2-3.5L58 44.5c-.6-.3-1.3-.5-2-.5z'/%3E%3C/svg%3E");background-color:rgba(0,0,0,0.5);background-size:cover;background-repeat:no-repeat;margin-top:-30px;margin-left:-30px;border-radius:50%}.lazyframe[data-vendor="vine"]:hover::after{background-color:rgba(0,0,0,0.75)}