
Hi Rebecca, since Stream Classic is retiring, so the Microsoft Stream for Office 365 E3 will not be related to Stream on SharePoint.
Stream (on SharePoint) is an intelligent enterprise video experience that is part of Microsoft 365,
Stream (Classic) and Stream (on SharePoint) follow different models for enterprise video. Stream (Classic) was a "single video portal" loosely connected to Microsoft 365. While Stream (on SharePoint) enables enterprise video directly in Microsoft 365 from storage up
Videos in Stream (on SharePoint) will be stored in the same place you store your Office files, in Teams, SharePoint, OneDrive, and Yammer.
You can share with special users through the sharing feature:
For more information, please refer to this documentation: Overview of Stream (on SharePoint) - Microsoft Stream | Microsoft Learn
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