Stream
What is Microsoft Stream?
Microsoft Stream is an Enterprise Video service where people in your organization can upload, view, and share videos securely. You can share recordings of classes, meetings, presentations, training sessions, or other videos that aid your team’s collaboration. Microsoft Stream also makes it easy to share comments on a video, tag timecodes in comments and descriptions to refer to specific points in a video and discuss with colleagues.
Source: https://docs.microsoft.com/en-us/stream/overview