Solution
When sending an email with a GoVideo to a recipient, and they view the video, you will get one of two types of notification. The notification will either be an identified view where their view data is associated with an email address and you will get a notification in the extension feed, as well as an email notification, saying who viewed your video and for how long. Or it will be an unidentified view where you will only receive a notification in the GoVideo extension feed saying "1 person" has watched your video.
To understand the type of notification you receive and why you received it, see the following article - Why does it say "someone" or "1 Person" viewed my video?