This video is of Haakon Solaas, from the Sogn region of western Norway, playing the hardanger fiddle in his home. If you can name this tune, please contact me so I can update this description.
In the beginning he also says "huldre" which is sort of a Norwegian witch, and is also a type of odd tuning. Then about 1:15 or he says Trond tuning. Perhaps next time you visit, you can ask him to name the tune and the region, e.g. Bruremarsj fra Telemark - Wedding march from Telemark
The tuning is trollstilt*, AEAC#. The tune itself is called Huldrejentas lokketonar. It's composed by a fiddler called Tarkjell Haugerud from Telemark. Knut Buen plays this tune on his album "Huldrejenta" from 1996.
Ingunn! Jeg kom fraa Amerika og min Norskemaal er stygg, men jeg ønsker den lernen. Naa kan jeg ikke det Norske ord paa sine Kirkesang 'O store Gud' finn i det Internet og jeg ønsker den har saa jeg kan den syng og spille. Kan du hjelp meg. Jeg spørsmaal du fordi du er din bare Norskeman jeg kjenne. Behage skriv paa meg neder her eller i min RU-vidkanal.