You can correct the problem easily by resizing video with Movavi Video Converter. If you try to upload a video with an incorrect aspect ratio to your device, the video will either not play at all or will be displayed incorrectly (probably with stretched-out images). Sometimes, you may need to resize your video or change its aspect ratio – for example, if you have a wide-screen (16:9 aspect ratio) HD video that you want to watch on the 4:3 aspect ratio screen of your iPod Classic.
