MatN has provided all of the ground work to make an AppImage for CinelerraGG.  I have followed the instructions he provided and there are now 2 versions for testing.  I only did very minimal testing to load a file.  Files are at:

cin_for_older_distros.AppImage                        - built on Ubuntu 16  (kernel 4.4, I think)

cin_for_newer_distros.AppImage                      - built on Fedora 32  (kernel 5.8, I think)

After downloading you will have to change the mode for execution (chmod +x cin_for_older_distros.AppImage)

For appimage, the build is supposed to be done on the lowest version distro because otherwise newer libraries might be missing.  For example, I tried running cin_for_newer_distros.AppImage on ubuntu 16 and GLIBC version xxx.xxx was not available.