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.