JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
<div class="containerLeft">
                <h2>1.</h2>
                <p>First, let's play a video.</p>
            </div>
            <div class="containerRight"><img src="http://tctechcrunch2011.files.wordpress.com/2012/09/michael-headshot-red.jpg?w=288" /></div>
</div>

CSS

.containerLeft, .containerRight {
    float: left;
}

.containerLeft {
    width:38%;
    height: 100%;
    background-color: red;
}

#main {
  float: left;   
    height: 300px;
}

.containerRight {
    width: 58%;
    height: 100%;
    background-color: #000;
}