using a second external camera with microsoft teams

I need a secondary screen to have a demo view of a table top surface while having the screen from my computer that shows me. Whiteboard is not the appropriate option. I have been trying to use quicktime or other secondary means to mirror my phone but not having much success. Any recommendations for an app that would integrate to allow easy toggling to live secondary camera. A recorded version is not right for this situation.

Yes, PLEASE add the second camera (or even a third) We want to be professional!

I work with students that require sign language to participate.  We are working remotely, and the students really need to be able to see my signs and see what I am sharing - for example, a powerpoint, document camera, or video without me needing to stop, unshare, sign, reshare, etc etc.  Multiple screens is essential for their success.

This is *exactly* what is wrong with Microsoft. We ask for a feature, and your response is "No, you don't that feature. Use THIS feature instead!" Are you an educator? Have you ever tried giving a lecture on continuum mechanics using a digital whiteboard?  Zoom already has the second camera, which is why I'm switching to zoom even though my university doesn't have a subscription.

I work with the Arduino and as a result use a document camera extensively to show setups and help students to trouble shoot their breadboards.  Thanks for the work around, this works for now.  I tried using the device settings to "switch" cameras, however I noticed that having a background negated the document camera altogether (the document cam background was black).  So I had to switch both device settings and the select/deselect the background filter in order to use the document camera while presenting.

I urge Microsoft to explore more flexibility in their product to allow for multiple entries in using external media sources, both video and audio for example.