You can simply forward the email with minutes attached or if you want them ti have full access to the video and asset, here are steps to share a Reelay for guest viewing access:
Open your Reelay recording
Click: Share
Enter the guests email address
Click: Share (at the bottom of the box)
This will give someone who doesn't have a Reelay account in your organization guest access to view the file. You can set an expiration date and send a custom message as well if you like.
