Nicola Benedetti just happens to be our foremost Scottish classical violinist, recognised the world over, and current director of Edinburgh International Festival: not bad, eh? The tune does get played in differing ways by different violinists and fiddlers: different tempos, phrasing, more or less double-stopping, more or less harmony with other instruments, etc.
As for what Jack Campin thinks (friend of mine), I know he doesn’t like the tune in question, especially that C Nat: he has been known to describe it as a “leave the room moment”. If he sees this thread, he’ll probably confirm that in no uncertain terms!