MP4 Downloader software (version 3.25.8) is a tool for downloading and converting videos from various websites such as YouTube, Vimeo, and Facebook. The software allows users to select the video quality and format for the downloaded content, including HD and 4K. It also includes a built-in media player and the ability to download multiple videos simultaneously. Additionally, the software has a simple and intuitive interface, making it easy to use for both novice and advanced users.