Use user entered code in confirmation

<?xml version="1.0" encoding="UTF-8"?>
<forms version="1.7.dev1">
    <form labelPlacement="top_label" useCurrentUserAsAuthor="1">
        <title><![CDATA[Let me use your code]]></title>
        <description><![CDATA[Reference <a href="http://www.gravityhelp.com/forums/topic/display-entry-value-on-page">this post</a>.]]></description>
        <confirmation type="message">
            <message><![CDATA[<textarea style="width: 400px; height: 250px;">
<iframe src="http://player.vimeo.com/video/{Enter your code here:1}" width="500" height="219" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe> <p><a href="http://vimeo.com/{Enter your code here:1}">Half Moon Run - Call Me in the Afternoon (Official)</a> from <a href="http://vimeo.com/kamerzysta">Czlowiek Kamera</a> on <a href="http://vimeo.com">Vimeo</a>.</p>
</textarea>


<p style="clear:both;">Here is the embed code for the number you entered: {Enter your code here:1}</p>
]]></message>
            <disableAutoformat><![CDATA[1]]></disableAutoformat>
        </confirmation>
        <button type="text">
            <text><![CDATA[Submit]]></text>
        </button>
        <fields>
            <field id="1" isRequired="1" size="medium" type="text">
                <label><![CDATA[Enter your code here]]></label>
            </field>
        </fields>
        <descriptionPlacement><![CDATA[below]]></descriptionPlacement>
        <notification>
            <to><![CDATA[{admin_email}]]></to>
            <subject><![CDATA[New submission from {form_title}]]></subject>
            <message><![CDATA[{all_fields}]]></message>
        </notification>
    </form>
</forms>