Free Video Editing Software That Is Genuinely Good Enough
Answers best free video editing software

"Free" usually means three different things and they are not interchangeable: free as in no money, free as in open source, and free as in a limited version of something paid. All three appear below, and each has a different catch.
DaVinci Resolve, free version
The real answer. The free version is not a demo: it edits, grades, mixes and composites, and the paid version adds features most people will not miss. It is the only free option on this list that professionals use on paid work without an asterisk.
Catch: it is heavier than the paid competition, it wants a reasonably capable machine, and the interface is built around a workflow that assumes you will use the colour page.
the download page, and the product page has the version comparison.
Kdenlive
Open source, cross-platform, and the best of the traditional open-source editors. It behaves like a normal NLE, which sounds like faint praise and is not: it means the skills transfer.
Catch: fewer advanced effects, and stability varies by build. On long projects, save often.
Shotcut
Also open source, also cross-platform, and more forgiving than Kdenlive on older hardware and unusual formats. Good for straightforward cutting of footage that other applications refuse to open.
Catch: the filter system is unintuitive if you have used anything else, and complex timing is fiddly.
OpenShot
The easiest of the three to start with and the least capable on a serious project. Fine for trimming, titles and simple assemblies.
Catch: it slows badly on long timelines with many clips.
What free cannot do, and where the line is
Graphics. No free editor gives you a motion graphics application. After Effects has no free equivalent, and the closest workflows are Blender's compositor or Fusion inside Resolve, both of which are powerful and neither of which is After Effects.
Professional interchange. Projects that open on somebody else's machine, with their fonts, their plugins and their effects. Free tools tend to use their own project formats, and a handover becomes an export.
Deep finishing. Colour management across a whole production, audio conforming to a broadcast specification, deliverables in a formal spec: all possible, all more manual.
Support when it breaks. The practical one. On a deadline, a paid licence usually includes somebody to call.
Which to choose
Editing for money: Resolve free. It is the only one where the free version will not become the reason a job is late.
Learning to edit: Shotcut or OpenShot. Get the concepts; move on when you outgrow them. The concepts transfer, the muscle memory does not, and that is fine.
Cutting on a machine that struggles: Shotcut, or Resolve with proxies.
Anything with graphics in it: none of them, for the graphics. Cut in whatever you like and get the graphics made somewhere they can be made.
For a client, the practical version of this is that the application matters much less than the questions being asked about the brief. If you are not sure what to ask for, the five lines on the contact page work regardless of what anyone edits in.