YouTube HypterLink

I added two YouTube links to the page.

I tested out the YouTube links

Next to the YouTube links are down arrow boxes. Clicking on the down arrow one is invited to pay for a 'direct link'.

When I open the page in the browser and roll over that arrow box I see below the code.

The line associated with that unwanted material is:

target="_blank" savefrom_lm_index="0" savefrom_lm="1">

The lines around the two links show nothing other the the hyperlink.

I did a page search for:

target="_blank" savefrom_lm_index="0" savefrom_lm="1">

and

savefrom

and

savefrom_

Found nothing.  As though hidden.

How did that line find its way into Dreamweaver CS6?

and how can I remove that code.

The hyperlinks to YouTube works fine.

Thanks for any insight into this.