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That's an awesome insight into how they film these docos.
It was only a matter of time before cinematic FPV drones came into their own for this, and the pilot there was very good at his job.
That last shot of the waterfall and the dive through it was spectacular, and probably worth any damage to the drone.
I've noticed a lot more cinematic FPV drones are becoming more mainstream with GPS type stability hovering, and even RTH becoming available.
It's the future I feel over DJI, who make their drones obsolete through their withholding supply of batteries and parts after 4 years or so.