OK, I've given the tape a viewing (it is called "Granuaile at Greenwich) and was originally made for RTE. After some introductory doco scenes the content follows the same programme as the CD, as per here:


http://www.iisresource.org/Documents/0A3_Granuaile_Songs.pdf


There seems to be one song missing both from the concert video and the CD, which was originally on an equivalent cassette release, called "The Dismissal", see https://groups.google.com/forum/#!topic/rec.music.celtic/rdRRx2PY6Vw. I'm guessing this is the elusive track you cannot find...

Regards - Tony