Kdenlive I'm sure many of you already know it, but for those users who don't know it yet, say that it is the acronym for KDE Non-Linear Video Editor. And indeed, it is a program that KDE developers have created to edit video in a non-linear way and based on the MLT framework. It is a good program with little or nothing to envy other closed source programs to perform the same action.
Also, as you can imagine it is free and open source, it is free. Although it was created in 2002 by JasonWood, It is currently maintained by a group of programmers, and from those early days until today, this software has evolved a lot. It has support for multiple image, video and sound formats with which to play and create fantastic videos with effects and other editing features.
Among the supported formats are those related to FFMpegas it is based on this one. In other words, it can support MOV, AVI, WMV, MPEG, XviD, FLV, etc. Of course it also supports 4: 3, 16: 9 aspect ratios, PAL, NTSC, various HD standards, HDV, etc. Undoubtedly, a large number of possibilities to export your edited videos, with a multitude of tools to work on editing the images, videos and sounds that we can add.
If you want to try it, you can access the official website of the project and access the download area. You will also find a fantastic Wiki in which to answer your questions, more information about the program, contact, forum, news, and of course numerous packages for different distributions (RPM, DEB binary packages, etc.), also versions for Mac and Windows. By the way, it is also available in universal packages like Snap, Flatpack, and Appimage, which can be easily installed on various distros… Try it, and you won't be disappointed!