This extension is designed for downloading online videos and differs from most video downloader extensions. In addition to downloading standard MP4 and WEBM videos, it can also download HLS videos and HLS live streams, which are currently popular for online video playback. It converts HLS streams into a single MP4 file without needing third-party tools.

**Features:**

1. **Broad Compatibility:** Supports popular online video formats.
2. **Optimized for Large File Downloads:** Utilizes concurrent request technology for faster downloads.
3. **Video Recording Feature:** Suitable for streams that cannot be directly downloaded.
4. **No Third-Party Tools Required:** For streaming videos, the extension can directly merge video fragments and output them as MP4 files.
5. **Regular Updates and Maintenance:** We continuously improve the extension’s features and fix bugs in response to changes in web environments and programming technologies.
6. **Security and Privacy:** It does not collect any user information or store any download data. All downloads and data processing are handled within your browser.