5-Year Warranty? I'd like your opinions :-)

Hello
regarding dead pixels, please note that most warranties only apply from 3 pixels at best, most often it's 5 or more; and it's rare to have that many on the same screen, so for just one that remains white, nothing will happen, warranty or not.
unless the warranty states black on white 0 defective pixels
getting a 5-year warranty for this reason is thus a bit (a lot) of a scam, you really need to read the contract
on the other hand, the most common issues with a TV are the backlighting of the panel (inverter) or the graphics card (often seen with Philips but not only...) or power supply failure (the red standby light flashing but the TV won't turn on)
so yes, an extension might be worth it.
please note that if nothing happens within the 2 years of legal warranty, the chances of it happening afterwards are limited, but not zero: it's up to you to decide
if you take advantage of the 100 euro refund offer, the 5-year warranty extension is not expensive given the price of this TV. but you only have 1 month (I think) to make a decision.