WebPlus X5: You Tube Video in Lightbox

hello

I wonder if anyone might be able to help me. I am the webmaster for a site that carries information on a young countertenor. I have recently rewritten the last section of one of the pages and did this by cloning the original page and then making the changes I wanted to to the new page - eventually deleting the original page when I was happy with the new layout. However I have now become aware that at the very top of the new cloned page above the name of the artist that some code appears on the screen when the cursor is hovered over it. It appears to be connected to an image that is half way down the page that hyperlinks to a You Tube Video which appears in a lightbox. (I do not think - but cannot be sure - that this code appeared on the original page.)

If the hyperlink is removed the 'code' disappears but everytime i repeat the hyperlink the code reappears. Does anyone have any ideas as to why this is happening please and how I could rectify it. A link to the page in question is below Many thanks for any suggestions

http://www.gregpritchard.co/high_notes_low_downs.html