Benjamin Berg created an issue:
A new repository is needed for screen casting. The project is a stand-alone application right now, which might be integrated more tightly in the future (Teams/Design/software-mockups#1). The project is already useful, and I would prefer hosting it more permanently on GNOME infrastructure. It is not part of any GNOME release set.
The source code is currently on github: https://github.com/benzea/gnome-screencast