What you should know
For sending a finished video to another person, MP4 is usually the practical answer. MOV is useful as an editing or Apple-origin master, WebM is strong for browser-focused delivery, and AVI should normally be converted before modern sharing.
When it is useful
Before uploading, define what the other person actually needs to do: watch the video, download it, verify information or keep it for longer.
- Send MP4/H.264 for the broadest audience.
- Keep MOV as a source file when editing quality matters.
- Use WebM for controlled web environments and replace AVI in modern workflows.
Recommended process
A short, verifiable workflow reduces failures and avoids unnecessary re-uploads.
- Ask what device or application will open the video.
- Inspect the codec rather than trusting only the extension.
- Create a compatible copy instead of renaming the file.
- Test video and audio before sending the final link.
Practical checks
Compatibility depends on more than the filename extension. The codec, connection, browser and device also matter.
- Some MOV files use codecs that Windows browsers cannot play.
- Some MP4 files use H.265 and fail on unsupported browsers.
- AVI files are often large and dependent on old codecs.
Limits, privacy and responsibility
The best format for editing may not be the best format for delivery. Preserve a master and create a separate sharing copy when necessary.
Frequently asked questions
Should I convert every MOV to MP4?
Only when recipients have compatibility problems; keep the MOV original for editing.
Is WebM good for mobile?
Modern browsers often support it, but MP4 remains safer across apps and older devices.