I have viewed this clip twice and its quite clear that this father isn't some mad, religious loony, as he has been described. He is an intelligent, loving father, that just wants the best for his little boy. And I also can't see how he is a kidnapper. It would appear that the Hospital haven't been responding to the parents in quite the way that they perhaps should.
My brother was desperately ill recently, with a serious head injury, and we sometimes found the Doctors to be somewhat gnomic and not as honest and plain-speaking as we would have liked, so I know exactly where this chap is coming from. You feel so hopeless when a loved one is in Hospital, and also helpless. You desperately want to do something other than sit for days at the bedside, but a feeling of impotence grows and grows, and eats away at you.
It would appear that everything that could have been done for the lad hasn't perhaps been done. I say perhaps because we don't know the full story here. We only have this brief explanation from his Dad. As to the proton beam aspect, I can't possibly say that it would be best for Ashya, but then again neither can his Dad. I would have thought that treating a desperately ill boy, by googling on the 'net is a very highly problematic and risky process.
The lad clearly needs to be in a Hospital again with immediate effect. My heart goes out to his parents but a long road journey down to Spain was certainly not the way to treat him. He may indeed be able to move his feet, as we could see but his is still demonstrably extremely ill. He could have fitted during the journey.....he needs to be in Hospital.
Don't know what else to say other then I hope the authorities are not too harsh on this man, who perhaps hasn't been able to think as clearly as he should. Fingers crossed for Ashya.