In Canvas Apps, the MS Stream control shows an error when using a video hosted on SharePoint - which is the default storage space for the new version of MS Stream. See screenshot below.
Currently the MS Stream control only plays videos from the "microsoftstream.com" domain i.e. the legacy version of MS Stream.
The new version of MS Stream is based on SharePoint and includes all SharePoint videos. The MS Stream plugin should support playback of these.
This is important as the generic video playback control for Canvas Apps does not support authentication. Thus, it also fails to playback videos hosted on SharePoint (unless the user has separately visited a SharePoint site within their current browser session).