Rated 3 out of 5 stars

I see the click-to-play screen for half a second, then Youtube tries to play the flash version. So I have the same situation as with noscript: I can stop autoplay, but if I want to actually play a video, it's always flash.
I am logged in to Youtube and I have set the html5-option. (Firefox 40.0.3, Ubuntu 14.04)