You can disable Flash, but you cannot disable the HTML5 native <video>... Until today! This is only Opera extension which will block the <video> tag in your browser.
It was very annoying for me when I browsed the web and suddenly some video started to play music or showing an advertisement and I've had to kill the browser's tab or lower the speakers' volume. That's why I've created this extension.
Now any video won't start playing until I click the red agreement button.
The Flash Player is being deprecated because of its security issues, so the Flash ads won't be a problem in a few weeks. But the ads companies will move their ads to the native HTML5 and will use the <video> tag which can be blocked only by this plugin.
The youtube.com and vimeo.com domains are on the whitelist so videos work normally there.