Sagey I belive Query is correct, once you have agreed to be filmed/photographed recorded and signed a contract to that effect then there is little redress as I understand it. Disregarding the copyright issue for a moment, if the editing of the film is such that 'poor' performance of an individual may be perceived then that should be adressed through the producer/s. However having already signed something which would probably preclude any editorial influence, H may be in a no win situation there. As for using the film in a compare and contrast exercise, again the editing may be an issue as well as the actual performance of the individuals concerned.
On the copyright issue there may well be a case to answer, it will depend on how much money people want to spend to enforce this, and what return it will bring them both in 'good will' and financial terms. There will still not be any protection from someone saying go and buy/borrow/look at video's A and B, on video A you can see X whereas on video B you can see Y which is much better because blah blah blah... This takes us back to the beginning to be sure of what you are signing up for, and the potential downside as well. And I know it's easy to be wise after the event!
PS
I have no connection with any of the companies or individuals in this thread.