Hi vhollo
depends on the youtube url you used, for advm you need to type in the url from the flash-object ("src-value") that youtube offers in the right grey box on the upper right side.
for example, here is a flashobject copied from the youtube textfield at youtube.com from a clippage
<object width="425" height="344"><param name="movie" value="
http://www.youtube.com/v/2iY210xDMN4&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="
http://www.youtube.com/v/2iY210xDMN4&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
http://www.youtube.com/v/2iY210xDMN4&hl=en&fs=1 is the source-url to be used in advm, since advm does nothing else than inserting this url into the object-tag from the advm-youtube-template.
If you are planning to use the snippet you can retrieve this url you saved within the manager on your document from the database with the parameter &valuetype=`value` for this way it’s the best to create a chunk including the youttube-object-tag with the snippetcall as the sourcevalue.
so, advm template-variables can be placed everywhere, chunks, tinymce-content, and so on, as long as they are visible on your website during rendering for the advm-plugin to recognize and assign the variable to a document-id.
the snippet itself is just a little helper, for example when you use ditto to list more than one advm-item with the same tvname within a document.