I open the browser, I go to amazon.de, I select a movie. If I have to buy it, amazon gives this funny popup two or three times that informs me that high resolution streaming is not supported on my platform (can't remember the exact text) which I confirm "yes, I still want to buy it", and then the player happily streams in full hd (1080p) which is my native resolution. I guess that prompt just checks the user agent string, but the player is happy if it has libwidewine.