Manage Course Video
Stream
Microsoft has a great collection of help pages for how to get the most out of Microsoft Stream.
Clipchamp
If you are looking for more robust editing options, you also have access to the broswer version of Clipchamp.
NOTE: Information added in Stream, like captions, chapters and callouts, will not transfer to Clipchamp, so edit in Clipchamp before you add those features in Stream.