Heavybuffet.
I suspect that the pilots will never be appearing in front of the Coroner - even in closed session. The tape is, therefore, possibly the best evidence he is going to get to represent the actions/considerations of the trigger puller(s?).
The tape is therefore of enormous significance. The USAF or RAF could eprobably offer up expert witnesses (any volunteers from the 'self-declared SME' Prooners?) to put the video evidence in context. Do remember that tragically the Oxford Coroners have steadily been gaining a lot of experience in similar matters.
Ultimately though, nothing better than to have the pilots appear in person!