@Nearmelab Turn off the AdBlocker has been succeed.
But Youtube with Ads is crap
Witch Adblock is working fine?

i disabled the adblocker, but nothing changed.
Maybe i have to reinstall opera.

@leocg the original Opera browser.

everytime im on Youtube, the website works very slow and laggy.
It takes 3-10 seconds for fullscreen, the timeline takes the same and so on...
My PC is not that old and each other website runs fast and without any problems.
I dont want to go back to Firefox.
How can i fix this?

Thanks for your help.