Video LAN Player is a popular cross-platform video player. When VLC opens a disc or file that doesn't match the height and width (aspect ratio) of the TV or monitor being used, black bars appear at the top and bottom of the screen in a process known as letterboxing. To remove these bars, you can use VLC's crop feature to match the video output to the shape of your screen. Video quality will be reduced, but you will have a "fullscreen" experience.
Start VLC. Click "Media," then "Open File" or "Open Disc" if you're playing a DVD.
Open the DVD or select a letterboxed video file. Click "Open."
Double-click the video to enter fullscreen mode. Right-click the video, then move the mouse over "Video," then "Crop."
Click "4:3" if your monitor is square-shaped. Click "16:9" if your monitor is widescreen. If you still see black bars at the top and bottom of your widescreen monitor, click "16:10."