hee

from one end (the one shown in the video) it has a hornbostel-sachs number of 421.111.11:

4 – aerophones
42 – non-free aerophones
421 – edge-blown aerophones
421.1 – flutes without a fipple
421.11 – end-blown flutes
421.111 – individual end-blown flutes
421.111.1 – open, single, end-blown flutes
421.111.11 – without fingerholes

from the other end, it has a hornbostel-sachs number of 423.121.11:

4 – aerophones
42 – non-free aerophones
423 – trumpets
423.1 – natural trumpets
423.12 – tubular trumpets
423.121 – end-blown trumpets
423.121.1 – neither curved nor folded
423.121.11 – without mouthpiece