Excellent footage Matt, and lots to mull over. Presumably a first for airguns?
It is interesting to see that in some instances there is a lot of initial air turbulence in front of the dart, showing that compressed air is getting past the dart flight fibres in the barrel. It seems to be more pronounced in the "pop gun" mode. I wonder why this is?
It would be worth posting your video heads-up also in the General Airgun section, to get the reactions of the technical bods.
Cheers,
John