As you know, Microsoft Stream is the video service from Office 365 allowing you to upload, share and stream video.
Well, you can now, in addition of uploading existing video files, capture your screen when creating a new video to be published in Stream.
This new capability may be helpful when you want to create training content for example.
While capturing the screen you can also include mic and/or audio system.
To start using the new capture screen feature, logon to your Stream portal (https://web.microsoftstream.com/) and use Create\Record screen menu
Then you may have a notification from your web browser (Edge or Chrome) requesting permission to use microphone and camera
You can then start recording your screen; there is 15 minutes recording limit
Before starting recording your screen you enable the use of your camera and/or mic