If you have Apple support in your country, you could certainly call Apple. They may have an option to ship it for service
You didn't say if you have tried the various hardware resets
Try both the PRAM and SMC resets. That Youtube video that you linked showed that some folks used a simple reset to get back to normal. It just takes a couple of minutes to do both, and it either helps, or no change...
I forgot to mention in my last post, reducing brightness to minimum work as expected; the screen is completely black.
Yep, I have to wait till Monday and I'm calling them. I guess my last hope it's a software problem disappeared just now, because there's ghosting all over the place. It's really scary to be honest. Does anyone know what could cause such a thing in the first place? The only thing I can think of is that I travel with it, so maybe it could have been pushed too much of something? Ehh, now it's just me trying to think of a reason for all this...
Resetting PRAM (a few times) + SMC was actually the first thing I did. It helped with the inverted color schemes, but that's it. I guess I can restore it to factory settings, but I feel like it would just confirm the inevitable.
EDIT: apart from pram and smc is there anything else I can do to check? After performing them a few times I actually can see a difference. There's still a lot of white, colors are a bit off, no black at all, everything looks a bit washed out, yet I can see everything a lot more clearly than before (it used to look as if I was having a fog on my screen :O). However, I'm very unsure about the ghosting. Every window opened looks transparent to some extent showing other apps that are open; doesn't matter if they are minimised.
I took a photo, but I'm not sure it really shows...But then I can't really see, because even the photo looks a bit transparent ;o.