SnapRec
SnapRec is a lightweight screen recording application
...It is designed to be easy to pick up — no complicated setup, no plugins, no third-party dependencies beyond a handful of well-known Python packages. You open the program, choose what you want to record, hit Start — and you're rolling.
The program is built to cover most everyday needs: tutorial videos, gameplay, YouTube recordings, demos, bug reports, or just quick screen clips to share with others. It supports resolutions up to 4K UHD and includes a built-in YouTube preset, so with a single click you get settings that are guaranteed to work on YouTube.