You can now turn off video detaching feature in Opera 39. Opera software has delivered video pop out feature with Opera 37 release, with which, when you watch video on sites like YouTube or Vimeo, you”ll be offered a button on top of video, when you click it, the your video will pop out, you can place it anywhere on the screen –top, bottom, left or right — useful to watch video on any page you’re working on.
If you don’t like the feature and want to disable it, Opera now provides an option or setting for it in Opera 39 (currently in beta).
Disable Video Pop out in Opera browser
1. Click on Opera Menu
2. Select Settings > Websites, scroll down until you see ‘Video pop out, under it, uncheck ‘Enable video pop out‘
3. Done, restart the browser for video page and other tabs not to show the detached video.
Note: You need to be using Opera 39 or later for this.