WebM.
An open, royalty-free video container designed for the web, typically pairing VP8 or VP9 video with Vorbis or Opus audio. The default output of every browser-based screen recorder.
Why browsers prefer it
No licensing fees, no patent encumbrance, native support in every major browser. Producing MP4 from `MediaRecorder` requires non-default options or post-processing.
Tracker compatibility
Linear, GitHub, and Notion play WebM in their native viewers. Slack renders the recording link with an inline player. Jira does not preview WebM inline today, so Screendog files the share URL — engineers click through to playback in the browser.
Frequently asked
Should I convert to MP4?
Only if a downstream tool requires it. Modern browsers play WebM natively.
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