<!DOCTYPE html>
<title>Reference for WebVTT rendering, cue reposition after enabling controls</title>
<style>
.video {
    display: inline-block;
    outline: solid;
    width: 320px;
    height: 240px;
    position: relative
}
.cue {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center
}
.cue > span {
    font-family: Ahem, sans-serif;
    background: rgba(0,0,0,0.8);
    color: green;
    font-size: 50px;
}
</style>
<div class="video"><span class="cue"><span>Foo</span></span></div>