Put the video file into your Dropbox, Google Drive, Onedrive and share it then send them the link to that video.
Read how for each cloud system. Here's the one for Dropbox.
https://www.dropbox.com/help/files-folders/view-only-access
I am trying to send an e-mail with a 159 MB Video, and when I click send, I get this message,
The message could not be sent.
There is not enough memory.
How can I rectify this?