There are several free and open source video editing software options available. Some popular ones include:
Lightworks: This software is available for Windows, Mac, and Linux. It has a wide range of features, including support for 4K resolution, a large number of video and audio tracks, and a powerful trimming tool.
Blender: Blender is a 3D animation and modeling software that also has video editing capabilities. It is available for Windows, Mac, and Linux and has a large user community, making it easy to find tutorials and support.
Kdenlive: Kdenlive is a video editing software for Linux, with versions also available for Windows and Mac. It has a range of features, including multi-track editing, effects, and support for a variety of video formats.
OpenShot: OpenShot is a cross-platform video editor available for Windows, Mac, and Linux. It has a simple interface and a range of features including 3D animation, support for a variety of video and audio formats, and a large number of effects and transitions.
Avidemux: Avidemux is a simple video editor available for Windows, Mac, and Linux. It is easy to use and has a range of features including support for a variety of video and audio formats, and the ability to apply basic effects and filters.