Press Ctrl(Command)+Shift+0 to toggle video playback, Ctrl(Command)+Shift+1 to delete history. Resume playback after 3-4 seconds.Eliminate the effort going to a specific tab and pausing the video. Now control your videos (on Youtube, Facebook etc) using keyboard shortcuts. Press Ctrl(Command)+Shift+0 to play or pause your video and Ctrl(Command)+Shift+1 to delete history of the videos that you have paused. These shortcuts keys can be pressed anywhere on your Desktop, you are not required to be within Google Chrome to access them.
Tooltip : Resume playback after 3-4 seconds if you have paused it using this extension.