What is Kdenlive?
Kdenlive [kdenlive.org] is a free video editor for desktop PCs (Linux, Windows, and macOS) that is similar to DaVinci Resolve but is libreware.
Review
I've tried to use Kdenlive before, but I had a lot of trouble with it because many things are just not intuitive at all. If you don't care about the libreware aspect, I recommend using DaVinci Resolve instead, which has a free version.