The Vidyard GoVideo app within Gmail or Outlook will insert a video or number of videos into the email body as a single player. When the insert button is clicked, Vidyard creates a new player for those videos in the relevant personal account. Therefore, the player is not technically being duplicated.
In most use cases, a video will only be used once as it will be personalized to the individual in the email. If you are using the same video multiple times, it may be better to transfer this to a shared group and then use the Email HTML code (found on the Share Tab) for use in an email distribution tool.