Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Kdenlive is a multitrack, nonlinear video-editing suite packed with some of the most recent video technologies. This application can be a great tool if you have serious video work to do, but you need to fully test it before attempting any mission-critical editing tasks.
Kdenlive takes some effort to learn. That's especially the case if you have little experience with other video-editing software. Kdenlive might be too much to take on as an entry-level editing tool.
If your hardware can tolerate its sometimes-finicky demands, however, Kdenlive can be a very productive next step from whatever else you are using now. Once you master its many features, Kdenlive can serve uses ranging from basic video editing to semi-professional work.