Nice idea! I have seen a solution of the problem when slides are on the left half of video and professor is on the right one but this is much more handy. Also

Nice idea! I have seen a solution of the problem when slides are on the left half of video and professor is on the right one but this is much more handy. Also please create a videoplayer which allows easily to set a speed, to do play/stop and to go back in 1 second without interrupt of a typing in another application. That will be useful while learning code or translating audio/video content but might require some new controls in conventional keyboard.