Any desktop operating system with a modern web browser is supported.
Currently supported browsers
Only recent versions of desktop browsers are supported. Mobile browsers and operating systems are currently not supported.
Supported video formats
Supported video codecs
Only formats supported by your web browser can be selected. Video format and codec support vary by web browser and version.
Audio recording is supported only by Chromium-based browsers when recording a screen or browser tab. To record audio, make sure you enable the Share audio option when picking the content you want to record.
Not yet, but this feature is on the priority list.
Videos are stored only in your web browser. No one except you can accesss them. They are never uploaded, stored or processed on the server.