After a take you may see MP4, WebM, or both. The safer choice is the format your audience can open without a special player.
Practical guide
- MP4 — widely accepted in email, LMS, and ticket systems.
- WebM — fine for web playback and many modern browsers; some corporate tools still prefer MP4.
If only one option appears, use it — Chrome’s encoder support differs by version. Then confirm playback before you send the file. Steps: trim and download.