Its funny how they have framed the video so that you will not see the end of the flame (there are some shots with full length blade, but really short) or see how the flame behaves in horizontal position.
At 4000 degrees Fahrenheit, would the flame's fuel gasses technically be a plasma?
And if so, then what's the detail that made both of us think that what they built doesn't match our expectations? Maybe we assumed they'd say "flame" for this design, and only say "plasma" if it was a cold plasma?
https://youtu.be/xC6J4T_hUKg?t=702
I think the real problem is probably how it must look when you move the blade quickly. It's essentially just a hose, so the "beam" will be very loopy. As far as I can tell, they really avoid moving the beam in the video for this reason.
The handle and backpack looked really cool though!