At https://github.com/KDE/kdenlive, it would be helpful to set the URL of the repo to https://kdenlive.org For example, at https://github.com/facebook/react you can see "reactjs.org".
Thank you for the hint. GitLab is the official repo of Kdenlive: https://invent.kde.org/multimedia/kdenlive. GitHub is just a clone/copy; hosted and controlled by KDE (which Kdenlive is part of). I don't know how long Kdenlive will be hosted on GitHub. I change this issue to whishlist.
Then perhaps the "Website" setting of the repo on GitHub should point to https://invent.kde.org/multimedia/kdenlive ?
Thanks for your report! This is a KDE wide setting, however now the website of the GitHub mirror is set to point to the original KDE Gitlab repository as you suggested.