https://alfalfalfa.com/articles/10983691.html
.yt-video-container { border: 2px solid #38b6ff; margin-bottom: 40px; padding: 15px; border-radius: 8px; background-color: #fff; }
.yt-video-header { margin-bottom: 10px; }
.yt-video-title { font-size: 20px; font-weight: bold; margin: 10px 0 15px; display: block; text-decoration: none; color: #0033cc; line-height: 1.4; border-bottom: 1px dotted #ccc; padding-bottom: 5px;}
.yt-video-title:hover { color: #cc0000; text-decoration: underline; }
.yt-video-meta { color: #666; font-size: 12px; display: inline-block; }
.yt-video-iframe-wrap { position: relative; width: 100%; padding-bottom: 56.25%; height: 0; overflow: hidden; margin-bottom: 15px; border-radius: 4px; }
.yt-video-iframe-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }
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Source: alfalfalfa.com
