FetchV
https://fetchv.netVideo sites supported by FetchV
What Is FetchV?

FetchV is a video downloader capable of converting HLS streams and detecting direct video links.
Based on WHOIS records and Internet Archive data, it appears to have launched in 2022.
How to Use FetchV
FetchV requires you to install its browser extension before you can use it.
The homepage has links to the Chrome and Edge extension stores, though both are Chromium-based browsers, so a single link would really suffice. That said, since it's a Chromium extension, it should work on other Chromium-based browsers like Opera and Brave as well.
Interestingly, early versions of FetchV in the Internet Archive also included a link to the Firefox extension store, suggesting it supported Firefox at some point.

Once the extension is installed, navigate to a page with a video. When a video is detected, the extension icon displays the number of videos found. Clicking the icon brings up a list of detected videos to choose from.

Click Download on the video you want, and you'll be redirected to the FetchV site, where conversion begins. Once it's done, you can download the file.
How FetchV Downloads Videos
When the extension redirects you from the video page to FetchV.com, it appears to pass along the video's m3u8 link or direct file URL.
FetchV then fetches the video data from that URL, accumulates the chunks, and performs mux processing to produce the final file — all on the FetchV page itself.
Notably, even when a direct video link is detected, FetchV doesn't simply download it as-is. It still runs the video through its own generation process on the FetchV site.
The overall flow — detecting the video, selecting it via the extension, being redirected to the downloader page, converting, and downloading — is the same as CocoCut. The key difference is where the conversion happens: CocoCut performs conversion and issues the download link inside the extension itself, while FetchV does both on its own web page.