An open-source video editor on Linux is one whose code is public and free to use, and the new one I'd look at is FilmCraft, which the ArtCraft team builds to work like Premiere Pro. Its GitHub page lists Linux builds as an AppImage, a Flatpak, a .deb for Debian and Ubuntu, an .rpm for Fedora and openSUSE, and a tarball, for regular x86_64 machines and for ARM64. The tarball installs into your home folder without admin rights.
It's a real nonlinear editor, which means you cut clips on a timeline instead of editing one long file: ripple, roll, slip and razor tools, multicam, color, captions, mixing, and H.264 MP4 export with its own encoders. But it's alpha, and the team says Windows and Linux get far less testing than macOS. On Linux, hardware decoding works for H.264 and HEVC, while color grading and export rendering still run on the processor, so big footage is slow. I'd try it on a short clip before you trust it with a real job, and only download it from the official page. My guide to the ArtCraft apps shows how to check the download is the real one.
More questions on this
Part of: Contractor Marketing, the full guide, with every related question linked.