HTTrack doesn't care about the page at all

It simply grabs all the URLs from the links. The filters then apply to those
links. and the URLs that make it through are then  downloaded and the process
repeats (if the file is a html document)

There is no way to do this directly, the way you are thinking.

Take a look at the actual URLs those things point to. Most of the time you'll
find some thing that only the fullscreen links have in common and you can
filter by that.

for example, see the following forum post, look at the site it talks about and
then look at the post reply
<http://forum.httrack.com/readmsg/36320/index.html>