The black bars show up because your display doesn't have the same aspect ratio as the program.

The silliest example of this is wogster's, where the image is cropped first by the people making the disc, then by the TV. That's where ZOOM comes in -- a straight zoom should fill the screen on a 16:9 set.

However, a 2:35 shown on a 16:9 will have black bars at the top and bottom, too.

What do you want to do instead of those black bars? Those bars are there because, in order to show the entire width of the image in a manner where a photographed circle is shown as a circle, they have to be there.

You could zoom in so that the screen is filled vertically. This chops off the sides. If you could stretch the image vertically so the black bars are gone, every bicycle wheel and car wheel will look like an egg somehow rotating yet staying taller than wide. As suggested, you can get the fullscreen version, where someone else has already zoomed in and cropped the sides for you. These occasionally create the funny scene where two people are shown from the side across a table and you can only see their noses, as the rest of them is cropped out.

Any solution involves cropping or distorting the image.