If you're looking to enhance the value of your live stream, integrating multiple camera angles is a great way to get started.
How? By using a video switcher.
A video switcher (or video mixer) is a device or software program that selects between multiple incoming video signals from various sources (camera, PowerPoint feed, etc.) and directs one of those signals to a single output, including a streaming device, video recorder, or a display device (i.e. a monitor or screen).
A director typically controls the switcher, analyzing the various incoming camera angles and selecting the best view to output.