How to Compress Video for Email
Email attachment limits are strict, and mail systems may add overhead during delivery. Leave a margin instead of aiming at the exact limit.
Confirm the actual limit
Your mail provider and the recipient's server can have different restrictions. When uncertain, a share link is more reliable for long videos.
Use a safe target
For a 25MB limit, aim near 24MB. For a 10MB limit, 9.5MB gives the MP4 container some room.
Protect the message
For a short spoken update, 720p with 96kbps audio is often sufficient. Longer clips may need 480p to avoid severe picture artifacts.