Run with:

docker run -p 5800:5800 -p 5900:5900 tessypowder/docker-kdenlive:latest

You probably want a folder to store your data:

docker run -p 5800:5800 -p 5900:5900 -v '/pathToFolderOnHost/':'/sharedContent':'rw' tessypowder/docker-kdenlive:latest

Then you can acces Kdenlive it via http on port 5800 or vnc at port 5900

Screenshot:

This image is based on the gui baseimage of @jlesage