I hosted a Zoom meeting tonight & recorded the main session, it was 52 minutes long and Zoom compressed it down to a 400 MB video which I then emailed to the normal host. I was hosting because for a change he was on of the meeting’s presenters.
Using my iCloud email account to send this big file was seamless. It was uploaded to iCloud’s Mail Drop area when it will reside before vanishing automatically after 30 days.
Recipients of such emails do not get an attachment, instead the get an email with a download link. Too easy. Just send it as you normally do but wait until the upload has finished before closing Mail.