JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="row grid-container">
  <div class="col-md-12">
    <div class="row">
      <div class="col-md-5">
        <div class="row img-container img-featured">
          <div class="col-md-12">
            <a href="/posts/1"><img class="img-responsive img-thumbnail" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
        </div>
      </div>
      <div class="col-md-7">
        <div class="row">
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>

          </div>
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
        </div>
        <div class="row">
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
          <div class="col-md-4">
            <a href="/posts/1" class="img-sub"><img class="" src="https://i.ytimg.com/vi/JPA_rzHDy6o/maxresdefault.jpg" /></a>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

CSS

.img-sub {
      height: 150px;
      overflow: hidden;
      width: 100%;
      display:block;
      position:relative;
    }
    
    .img-sub img {
      height: 100%;
      position: absolute;
      margin: 0 auto;
      left: -50%;
      width: auto;
    }