This is a poorly recorded video, and the dancing is mediocre. The set goes wrong, and starts again on 1:12.  That failed part has been blocked here.  The video has the name "The Glens of Angus", but it is Drewry's Tappie Toorie.  Another video from the same occasion shows this dance being taught.

The video was uploaded by "Heidi Afschar".  Her photograph can be found on http://rscds-losangeles.org/PDFs/GC_Mar12.pdf.  