When I publish my site either a local folder or to my live domain I have a large mp4 file which is published into the index_htm_files folder but doesn't appear on the site. I remember testing it quite a while ago and deciding not to use it.

However looking through each of the 25 pages on my Web Designer Premium 18.5 I can't see that file lurking somewhere on the pasteboard or on a page.

Is it possible to find where this mp4 is by searching (maybe hidden behind something on a page or the pasteboard) to get rid of it? (I have the full filename)