What interests me more about things like this is the fact the people who can't see certain colours would never be bothered by it if it wasn't for those who could. Imagine you're a 21 year old man/woman who has gone through life perfectly happy. You've loved, you've cherished, you've nurtured, you've appreciated, you've felt everything that makes a human content, and then one day someone points out you can't see green. Suddenly you feel as if you're 'missing out', that everything the world has to offer is not available to you.

But only 'important' because those that can see the colour have given it importance. I'm just interested in the idea of knowledge/contrast/relativity being the main factor at the bottom of many problems. That's not to say we should ignore those problems, it's just a phylisophical observation. Given a life without green or red, there would be no sense of 'loss' for those who could not see it. Some of the people in that video even expressed their apathy towards the revelation of colour prior to discovering they were 'missing out.' People are starving, dying or suffering throughout the world and yet for these people 'colour' is something to 'worry' about, but that worry is never put into perspective because this world requires the notion we have 'less than'. Having 'less than' is a greater motivation than 'having enough'. It's what drives capitalism and creates wars (both domestically and politically).

These people were happy before they realised they had 'less' than others and these glasses cement that sense of 'less' by proving once and for other people possessed something they didn't. In this case colour.

That's in response to your "Given a life without green or red, there would be no sense of loss for those who could not see it". :D You're right if the color has no purpose in our daily lives. Ignorance is sometimes bliss. Well, "less than" and "having enough" is really a part of nature.  Nature is what drives everything. Just to feed yourself, another lifeform must die then be devoured. Most living creatures live like that and because of that we're all in a constant state of conflict with eachother. War is a natural part of nature. Governments just mirror nature. 

I was glad for them.

Its like in every type of situation. people from poor countries are happy and one day they are jealous because they found out others have more. Normal people are happy until they find out how much money rich people waste on nonsense etc. Kids play ugly looking games on PS2 and are happy even tho someone else plays the same game with better looking visuals on xbox. And when they are older they whine about having worse resolution compared to other consoles. (Funnily enough having inferior stuff compared to someone on PC does not matter because for whatever reason that does not count. Which just shows how artificial the "probem" is)

In German a nice saying exists:

"Wenn das woertchen "wenn" nicht waere, waeren wir alle Millionaere."

If the word "if"would not exist, all of us would be millionaires.