If your file is greater than 25 MB, Gmail automatically adds a Google Drive link in the email instead of including it as an attachment. Learn more about Google Drive attachment sharing settings.
How can I send more than 25 MB of a video in Gmail?
If you want to send a file larger than 25MB via email, than you can do so by using Google Drive. Once you’re logged into Gmail, click “compose” to create an email. Then, you’ll see a paperclip icon at the bottom of the email that indicates a file attachment.
How do I send a file that exceeds 25MB?
Use Google Drive This is the default option for most people trying to share files that are larger than 25MB. When Gmail detects that your mail is larger than 25MB, it automatically uploads your attachments to Drive and adds a download link to it in your mail.