I could probably write an essay on the number of moral abuses I've seen in airports, from the typical inappropriate "you need to calm down" to seeing people in clear medical or mental distress (gladly few, but some of these experiences being mine).
We would never expect this sort of behavior anywhere else in society, yet we're letting this go on as if it were normal. I personally wonder how this is even legal, but I suppose that's beyond the point. This may be an overused quote, but "those who sacrifice freedom for security deserve neither" rings very true in this instance.
How is oppressing the vast majority of flyers any better than the terrorism we are supposedly preventing? I would even go as far as saying that this sort of behavior is most likely what encourages terrorism in the first place, but I digress.
Airports are one of those far-too-regular cases where "you're guilty until proven innocent" has become the norm. Anybody in their right minds know full well that if somebody really wants to make anything happen on a plane, it will. It's clear that restrictions against foods, liquids and whatever else are more about perceived security than actual security (also very possibly about purchases...).
I truly understand the reason (beyond medical) the OP was driven to shoot that video. People saying he was picking a fight may or may not be right. Similarly, his legal reasoning may or may not be biased. But that's not the point, the law is there to protect freedom, not obstruct it.