Hmmm, Not sure if that's correct as it appears that I have the same firmware version as mentioned in the post, unless I misread it.
Supposing to have battery to lose only 9% after 2hrs on Netflix. So tried the experiment as well on my l950xl
House of cards e03s01 which is 58 min, battery saver on, 25% brightness, flight mode on with only WiFi on for streaming, battery drained 11%. No way 9% after TWO hours. My l950xl is 2 weeks old, hasn't even fully set up emails or anything backgroundy, so not sure how that is possible unless I have got a suspect battery problem.
Weirdly, with flight mode off, and 50% brightness, I still only lost 11% battery.
Also, slightly off topic, since I had a problem with battery not charging whilst plugged in and playing Microsoft bingo game, Netflix had no problem and was charging fine. Yet surely Netflix is more complicated then that bingo game, but Netflix performed better battery wise!