NOT A BUG - No pop-up image of video on time bar that scrolls by

Hi, I have noticed that on other video players (ie: Flash) when you put your mouse pointer on the "Time Scroll Bar" (I do not know what it is called) an image of that point of the video is shown. So if I find a point in the video I would to go to (as I do not know the time position in question), I put the pointer on a position and watch the images appear as I move the mouse on the bar. I can then see where I want to go (time position), I click on the bar and the video plays from there. I hope I explained myself well. Kreestakratsa