Video Downloader Professional - MPMux is a professional video downloader plus that allows users to save or record online videos in various formats such as HLS, m3u8, and mp4. This browser extension is designed specifically for saving web videos and offers a range of features to enhance the downloading experience.

One of the key features of Video Downloader Professional - MPMux is its ability to save static videos in formats like mp4, webm, flv, ogg, and avi. This means users can easily download and store videos from websites without any hassle. Additionally, the extension supports saving streaming videos, including m3u8 videos, and allows users to save them directly to their disk in mp4 format.

Another notable feature is the ability to save large streaming videos by downloading them in chunks. This means users can download even 10GB videos without any issues. Moreover, the extension also supports recording web live and streaming video buffers, which can then be converted into mp4 videos.

To further enhance the download speed, Video Downloader Professional - MPMux allows users to request data concurrently through multiple threads, resulting in faster download speeds.

It's important to note that this extension is a general online video saving tool and does not specifically cater to individual websites. While it works on most pages, there may be instances where it doesn't support non-mainstream playback technologies. In such cases, users are recommended to explore other extensions that may be more suitable for their needs.