Pitivi is a video editor built upon the GStreamer Editing Services. It aims to be an intuitive and flexible application that can appeal to newbies and professionals alike.
Your involvement is what keeps this project moving forward. There are many ways in which you can contribute.
For the list of dependencies, look at pitivi/check.py
You can hack on Pitivi in a local flatpak sandbox which is easy to set up.
To get get the most out of your time and effort, come talk to us so we coordinate.