There are a number of ways to install Kdenlive on Ubuntu systems. The simplest way is via Ubuntu Software Center. Just Open Ubuntu Software Center and do a search on Kdenlive and follow the install process.
Install via SNAP
You can also install Kdenlive via Snap application. to install via snap open the terminal application by pushing CLT+ALT+T and typing
sudo snap install kdenlive
Install via PPA
Open ‘terminal’ from your system application menu, and run command to add the PPA:
sudo add-apt-repository ppa:kdenlive/kdenlive-stable
Type your password when it asks (no asterisk feedback) and hit Enter to continue.
sudo apt update
To update the repositories. Then simply run the command in the terminal to install the video editor:
sudo apt install kdenlive
NOTE for non-KDE users, Kdenlive will be installed along with a large list of KDE libraries.
App Image Non-install
There is also non-install 64-bit
.appimage package is available in files.kde.org.
Note*: Make sure you go to the bottom of the page for the latest version