i see that too. i imagine the intent might've been to make foreground items more readable, but in reality it just makes the bakcground look worse. i'd like to disable this darkening feature.

yeah, it has "force player type" setting now

Originally posted by Alacran:

Right click on the video and choose "about HTML5" or something.
You will be asked to join the HTML5 Trial. If you are not on the trial, JOIN FIRST.
After that, LEAVE the trial.
If you are already on the trial, just choose LEAVE.

In Opera, choose settings-Privacy and Security-Clear browsing data.
Close Opera, and open it again.

that worked, thanks!

i think i found the problem: HTML5 Youtube player. SRWare Iron and old Opera uses Flash player, so there's no such problem.
untill that problem solved, i would like to know if there's a possibility to turn off HTML5 for youtube or completely, so i can watch Youtube normally.

Opera Next 18 now, still the same.

i have the same problem with Opera Next 17.0
i've tried some plugins, like Magic Actions for Youtube to set video quality to maximum, but it didn't helped either.
also, this problem is not present on pre-Chromium Opera.