Greasy Fork is available in English.
The script provides a series of much-needed enhancements for YouTube, including: 1) an optimized video details page layout, 2) free video downloading, 3) video screenshots, 4) dark/light theme switching, 5) video fast‑forwarding, and more.
< Feedback on Enhancer for YouTube™: New Layout, Video Downloader, and More Features
when script is running can't save video preview disabled it's come back enabled again after restart the browser