After watching the video I'm left wondering how k2pilot would respond to the analysis. Is the idea that you could use these jet engines as part of a vertical takeoff?
Thrust/weight ratio of a military jet engines: ~9
Thrust/weight ratio of a commercial turbofan: ~6
Merlin also has a much lower cost per unit thrust, 200x lower than a military jet engine, 400x lower than current commercial high bypass turbofan engines.