Open Source Video Editor
In video editing the footage is cheap to reshoot but the edit decisions are not, and those decisions live in a project file that a paid upgrade or a folded company can render unopenable - so the timeline's format is the lock-in, not the export. The open source editors here keep projects in formats you can read and machines you control, encode to standard codecs without a subscription, and still open the cut you made years ago.
OBS Studio
Free and open source software for live streaming and screen recording with capture, compositing, and encoding
OpenCut
Free and open source video editor that runs in your browser
LosslessCut
Cross-platform FFmpeg GUI for fast, lossless cutting, trimming, and remixing of video and audio files
Cap
Open source screen recorder for shareable videos, with local editing and full self-hosting
Screenity
Privacy-friendly screen recorder and video editor with unlimited recordings and no sign in needed
Shotcut
Free, open source video editor for Windows, macOS, and Linux
Olive Video Editor
Free non-linear video editor for Windows, macOS, and Linux
OpenShot Video Editor
Free and open-source video editor for Linux, Mac, and Windows with FFmpeg formats and timeline editing
Kdenlive
Free non-linear video editor for everything from home videos to complex projects