AnFi - I do understand what you are trying to say - I just think you are wrong.
I don't think there is an 'Ultimate Load' based on coning angle and certainly not anything useful to be gained from trying to measure the coning angle from a video clip.
All you can say with some certainty is that overpitching is taking place because the disc has coned up - to infer that anything else is measurable ie CT/sigma, G load factor etc from that is guesswork and unproven theory.