How to make the following code insert the youtubeId parameter:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet 
    version="1.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
    xmlns:msxml="urn:schemas-microsoft-com:xslt"
                xmlns:YouTube="urn:YouTube"
    xmlns:umbraco.library="urn:umbraco.library"
    exclude-result-prefixes="msxml umbraco.library YouTube">


<xsl:output method="xml" omit-xml-declaration="yes"/>

 <xsl:param name="videoId"/>
<xsl:template match="/">
 <a href="{$videoId}">{$videoId}</a>

<object width="425" height="355">
<param name="movie" value="http://www.youtube.com/v/{$videoId}&amp;hl=en"></param>
<param name="wmode" value="transparent"></param>
<embed src="http://www.youtube.com/v/{$videoId}&amp;hl=en" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed>
</object>$videoId {$videoId} {$videoId}
 <xsl:value-of select="/macro/videoId" />
</xsl:template>

</xsl:stylesheet>

As you can see I have experimented quite a bit. <xsl:value-of select="/macro/videoId" /> actually outputs the videoId but all other occurences do not. This must be an easy question to answer but I just cannot get it to work.