Darren,
I too have tried to see if I could come up with an ‘unplugged’ device to mix more air into the flame. Most showed no improvement at all.
The 18-blade ‘fan’, shown below was the only one which looked give a marginal improvement. Remember, that Trangia burner you pointed at on YouTube, already showed near-perfect combustion, so little extra improvement was needed. The un-treated flame of the Origo 3000 looks more like a yellow torch flame, so clearly needs a lot more air added.
I have now ordered an aquarium air pump, rated at 2 x 180 litre/hour. I have no idea if that is sufficient capacity. That pump runs on 220Vac so I will use a little DC-AC inverter to feed it from the battery. The first test will be with the straight copper tube with five holes in it; the one I initially attached to the car tyre pump.
Arne
PS: The need for that inverter is not all bad: This can be helpful in driving and re-charging all sorts of small electronics, like the battery charger of the camera.