Greasy Fork

Is there a way to replace the https://twittervid.com/ site with more useful https://twittervid.com/ one?

You can use the official TwitterVid.com extension:

• Chrome: https://chrome.google.com/webstore/detail/twitter-video-downloader/fpbmnfnipncpbfenhgoodkocemppkbbi
• Firefox: https://addons.mozilla.org/en-US/firefox/addon/twitter-video-downloader/
• Edge: https://microsoftedge.microsoft.com/addons/detail/twitter-video-downloader/fljbipkhnfnekhfpkjpanojhhikbfjhm