This is the code that is placed in the Call To Action field. Make sure HTML is selected.
<style>
.video-overlay {
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
    bottom: 0;
    left: 0;
    padding: 15px;
    position: absolute;
    right: 0;
    top: 0;
}
.video-overlay .video-message {
    left: 0;
    margin: -75px 0 0;
    position: absolute;
    right: 0;
    text-align: center;
    top: 50%;
}
.video-overlay .hint{
    font-size: 14px;
    margin: 0;
    color: #999999 !important;
    font-weight: normal !important;
}
.video-overlay h3 {
    color: #FFFFFF;
    font-size: 30px;
    margin-bottom: 15px;
    margin-top:5px;
    font-weight: bold;
    letter-spacing: -0.03em;
    line-height: 1.2;
}
.button {
    background: #4090BA; 
    border: medium none;
    border-radius: 4px 4px 4px 4px;
    color: #FFFFFF !important;
    cursor: pointer;
    display: inline-block;
    font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
    font-size: 14px !important;
    font-weight: bold;
    line-height: 1 !important;
    padding: 13px 15px;
    vertical-align: middle;
    white-space: nowrap;
}
.button-green {
    background-color: #82B964;
}
a {
    color: #4090BA;
    cursor: pointer;
    text-decoration: none;
}
.button-green:hover {
    background: #74B152;
}
</style>
<div>
    <div>
    <p>Your next step is...</p>
    <h3>PLACE THE TITLE OF THE NEXT VIDEO HERE</h3>
    <a href="url" target="_parent">BUTTON TEXT</a>
    </div>
    <!-- to be sure - use absolute complete URLs -->
</div>
 
															