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<!DOCTYPE html>
<title>Reference for WebVTT rendering, bidi ruby</title>
<meta charset="UTF-8">
<style>
html { overflow:hidden }
body { margin:0 }
.video {
display: inline-block;
width: 320px;
height: 180px;
position: relative;
font-size: 9px;
}
.cue {
position: absolute;
bottom: 0;
right: 0;
text-align: center;
unicode-bidi: -webkit-plaintext;
unicode-bidi: plaintext;
direction: ltr;
writing-mode: vertical-rl;
-webkit-writing-mode: vertical-rl;
}
.cue > span {
font-family: sans-serif;
background: rgba(0,0,0,0.8);
color: white;
}
</style>
<div class="video"><span class="cue"><span><ruby></ruby>に<ruby> 見<rt>み</rt></ruby>えるのは...<br>二行目</span></span></div>