I never dyed my hair. I dont think it's healthy for my hair and I like naturalness. By the way your video is interestig.

I don't prefer of that. Personally, natural hair is the best. :D

Once, I dyed my hair with the purple color (just a little bit of it). It was terrible, not because it was ugly but because my hair is naturally black and it's hard to dye it with another color. 

It's hard to keep your hair hydrated and beautiful, sometimes you need a lot of money (in some cases)

I think it's beautiful a dyed hair, mainly when the person can take care of the color and the hair itself. 

Oh wow, that really is BLUE! I once dyed my hair bright green when I was in my teens. Your friend might feel at home in this Spanish village, which your video reminded me of: http://www.independent.co.uk/travel/news-and-advice/smurfs-blue-spanish-village-juzcar-3d-film-premier-andalucia-sony-pictures-a7885771.html

I watched the video. That moment when he shaps his fingers and and we see his hair dyed is brilliant xD I watched it many times :)
According to your question I wouldn't dye my hair 'cause I'm sure it doesn't suit me.