Well spotted, Egg. I'd just pasted the HTML I developed in a separate file into the Placeholder in Xara WD, without separating the <head> and <body> elements. Although it worked fine, I agree with you that it's not correct, so I've fixed that in the file here: CarouselLightboxExample2.web.

I've also republished the demo site to www.wood-net.co.uk/xwd/carousellightbox

Now I just need Siran or Acorn to see if we can integrate the Lightbox code into the Carousel, so that when clicked the videos will open in Lightboxes...