I am professionally involved in aviation, related to aircraft the size of the DHC-6 Twin Otter. I can personally attest to having personally pumped JET-A and JP-8 into the belly tanks of a Twin Otter. The stuff coming out of the fuel nozzle isn't compressed air. It looks and smelled like kerosene. I'll go so far as to say that it IS kerosene. I can smell the gas coming out of the turbine engines. It's not compressed air. It smells like burnt kerosene. I'll go so far as to say that it IS burnt kerosene. Funny thing ... when we take off, the belly tanks are full. When we land, they're empty. And the engines are HOT. Funny thing ... the only pipes leading out of the tanks go straight into the engines. And shockingly enough, there are no compressed air tanks anywhere on the aircraft.
Draw your own conclusions.
Okay, the only thing I can attest to is the sound of the engines; they do sound like air turbines and not combustion engines, especially on landing when they are thrown into reverse (excuse my layman’s ignorance of proper terms) What did you think of the video? I cannot disprove anything they are saying.