Opera browser has updated one useful feature that is floating pop video player, this feature allows you to shift video on any screen, so that you can do multitask, like using other tabs, reading comments, or even working, this pop will always on top; place it wherever you like and close it immediately should the need arise.
To use this feature go to a video page, such as YouTube and run a video, you should see an additional button in the middle of the top border just click on that you will get a floating video player, it also has resize, move, play and pause options.