Pitivi, a free and open source video editor for Linux
For those looking to actually edit video professionally on Linux you can’t really beat the free version of Davinci Resolve. Over the past 5 years it has become an incredibly competent non-linear editor alongside being the industry standard for color grading. I’ve honestly tried everything under the sun on Linux for video editing and nothing beats it. If you’re looking to stay open source I think blender is starting to become more competent but still a bit of a task getting it setup for doing serious NLE video work.