Show a bug without a cloud recorder account. The file is WebM. Tabs that play DRM or protected video may capture black.
A one-off bug for a ticket, not a product demo channel. This page calls getDisplayMedia and MediaRecorder, then downloads WebM. Loom-class SaaS uploads. We do not.
Microphone-only notes are voice recorder. Trimming a file you already have is video trimmer. Narrating a script without video is text to speech.
Short how-tos, WebM
getDisplayMedia plus MediaRecorder. Output is typically WebM, not a Zoom room and not MP4. System audio depends on the share dialog. Long lectures blow memory. Gmail’s personal cap is 25 MB if you attach the file.
How to use it
- Allow the picker (screen / window / tab). Wrong choice is the usual blank capture.
- Stop when done. Download WebM.
- If the file is huge, trim it on the trimmer — still WebM, still local, still about 32 MB.
Honest limits
Not an editor. Not a promise of system audio on every OS. Protected video frames may be black by design.