Do not try to stretch the 4:3 image to fit a 16:9 screen. The film is meant to be seen with black bars on the sides to showcase the full vertical image. Conclusion
The .mkv file extension is highly popular among cinephiles because it acts as a universal container. It seamlessly holds multiple high-quality audio tracks, complex interactive menus, and subtitle files within a single download. Do not try to stretch the 4:3 image to fit a 16:9 screen