I watched the vid a few days ago, so my memory may be hazy. The band played one tune as they were coming in that I did not recognize. The next tune was, IIRC, “When Irish Eyes Are Smiling,” and when Barr joined in it was for “Scotland The Brave”.
I don’t know the names to the songs, but I don’t think it was “When Irish Eyes are Smiling.” I know that song. But I was so enthralled with the pipes & men in kilts. [sigh]