Use Microsoft Stream with Sway
You can include Stream videos into your Sway using the embed code.
The permissions on the video in Stream are respected in Sway.
Get the embed code from Stream
In Stream, select Share from either the video page or when finding videos through search or browse.
Select the Embed tab.
Copy the embed code.
Insert embed code into Sway
Select Cards on the top navigation bar at the top of your Sway.
Select Embed within the Cards pane, then paste your embed code to the new embed card that appears in the Storyline.