You can download both analytics reports directly from Webcast Manager or from your analytics account, if your account is enabled for analytics.

If you do not have analytics enabled, you can still download from the basic report from Webcast Manager in the Customer tab.

Note that for private Webcast events, only the creator of the Webcast event and users assigned the role of event editor can access viewer statistics within the WebcastManager.

For more information on how to download viewer statistics, consult this article.