How do you send MP4 files via email?
Written by Cameron James·September 9, 2026Quick answer
Usually you cannot send an MP4 as a normal attachment, because Gmail and Outlook.com both cap attachments at 25MB and most video files are larger than that. The reliable method is to upload the MP4 to cloud storage and email a link to it instead. Gmail does this automatically, swapping an oversized attachment for a Google Drive link before the message sends.
Key facts
- Gmail caps attachments at 25MB on personal accounts. Anything larger is uploaded to Google Drive and sent as a link instead.
- Outlook.com also caps direct attachments at 25MB, but will send a file up to 2GB as a OneDrive link.
- Work and school accounts can have lower limits set by an administrator, so a file that sends fine from a personal address may be blocked from a work one.
- Most MP4 exports already use compressed video and audio codecs, so zipping one or putting it in an archive saves very little space.
- The recipient has a receiving limit too. A message can leave your outbox and still be rejected at the other end.
- WeTransfer's free plan allows 10 transfers, or 3GB in total, in any rolling 30-day window.
- Trimming the clip or exporting at a lower resolution cuts the file size far more than compressing a finished export.
Why the attachment keeps failing
Video gets big fast. A 1080p export at a fairly ordinary 8 megabits per second is around 60MB for every minute of footage, so you are past Gmail's 25MB ceiling somewhere in the first half-minute.
People try to compress their way out of this, and it rarely works, because an MP4 has already been compressed. Zipping it might shave a percent or two. The size only really drops if you trim the clip or re-export it smaller, which means going back to whatever you edited it in.
Send a link instead
Upload the file to Google Drive, OneDrive, Dropbox or WeTransfer, set the sharing permission, and paste the link into the email. Gmail will do the Drive version for you if you just attach the file and let it. Check the permission before you send, because a link that demands an access request is worse than no link at all, and you will not find out for two days.
The version at work is harder
Personal email is the easy case. Corporate mail is where this genuinely bites, because your administrator may have set a limit well under 25MB, and the recipient's server gets a veto you never see. I spent years sending decks and walkthroughs around and the pattern was always the same: the file went, the delivery failed quietly somewhere in the middle, and I found out on a call a week later.
If the MP4 exists to explain a document you are also sending, splitting them into two attachments is its own problem, because the reader has to hold a video in one window and a PDF in another and work out which page you are talking about. That is the thing LiveDocument fixes, by attaching the walkthrough to the PDF or image so both travel behind one link. It will not help you send a standalone MP4, though, so for a plain video file the cloud storage route above is still the answer.
The Bottom Line
Stop trying to squeeze the file into the message. Upload the MP4 once, send the link, and you get a video that plays for everyone plus a copy you can replace later without emailing anybody again.
Written by Cameron James