Greasy Fork is available in English.
Adds a floating button to download YouTube videos, Shorts and music in high quality, with built-in SponsorBlock and the ability to bypass YouTube’s detection pop-up for a fast and smooth experience.
The download is transferred to another site yes. In the description text: "We are not responsible for the content of the site." 😉
the download script transfers to another site, cannot find the link to the video in the html code itself. useless script if the video is for personal use or has age restrictions.