This one looks rather unusual. I might get such flute…
It’s a gemshorn in English. The horn looks like ibex, the usual material for gemshorns in Europe.
That one is unusually good and the guy plays it well.
The ibex horn has a unidirectional curve, unlike the one in the video which - as has been stated - is the horn of a blesbok, a South African antelope.
Although the instrument has always been called “gemshorn” or “cor de chamois”, the illustrations of Virdung and Agricola clearly show it having been made from cow horn. The horn of the chamois is not usable at all, being far too small and only as thick as a human finger. The ibex has at all times been a rare animal, besides living in nearly unaccessible parts of the Alps, so it is very unlikely ibex horn has ever been used.
Here is the website where this flute comes from:http://www.firewindflutes.com/Firewind_Flutes/Gemshorns.html
I ordered the same instrument from this craftsman. We’ll see.
Just found this one: amazing! http://youtu.be/EBKC2YJ2YsA
Google doesn’t find a lot of ibex-horn gemshorns, but this looks like the ones I’ve seen in use:
http://www.wattsandwatts.co.nz/gallery.php?id=anytime4851ac4e3957c
Sachs, in Reallexikon der Musik-Instrumente, says they were made of “unkenntlichem Material” but quotes The Complaynt of Scotland of 1548 as listing “ane pipe maid of ane gait horne” (“gait” is Scots for “goat”).