I edit most of my bike videos in iMovie on macOS. It’s quick and easy for what I need to do, and although it’s not a professional editing package, it’s very good for quick tasks. And it’s free if you own a Mac (or at least it once came free with it).
Over time I’ve amassed a huge library of videos that are still part of my library, and there comes a time at which even the biggest hard disk runs out of space. I already knew that I could delete a single project by selecting the project from the home page, then using the little disclosure menu on the bottom right and select Delete Project.