You missed one edit at the first of that template..
Code:
<!-- youtube -->
<if condition="$userinfo[fieldx]">
Looks like it should be
Code:
<!-- youtube -->
<if condition="$userinfo[field6]">
Your code should be this,
Code:
<div class="alt1 smallfont block_row"><if condition="$userinfo[field7]">Title: $userinfo[field7]</if></div>
<div class="alt2 block_row block_footer"><object width="240" height="200"><param name="movie" value="http://www.youtube.com/v/$userinfo[field6]"></param><param name="wmode" value="transparent"></param>
<embed src="http://www.youtube.com/v/$userinfo[field6]$userinfo[field8]" type="application/x-shockwave-flash" wmode="transparent" width="240" height="200"></embed></object></div>
Field6 should be the Youtube ID
Field7 should be the Title..
Field8 should be the Autoplay