using a second external camera with microsoft teams

Thank you. That will definitely help...although I occasionally use text scrolling/timers in OBS, and flipping them really makes it hard to use. But if I can just get the cameras to work that's a breakthrough...

You can mirror the video in obs; Select the thing you want to mirror, right click, -transform-flip horizontal. This works just fine for me.

I am using OBS and I have two cameras. It works just fine in MS Teams *except* that the images are mirrored and I cannot figure out how to change it in MS Teams (like you can in Zoom). If I mirror the images in OBS then it shows up in Teams just fine, but I suspect this is a limitation of MS Teams. 

At any rate, you can definitely use two cameras. You need OBS (which supports as many cameras as you want) and then OBS spits out a "virtual camera" to MS Teams. You can control which camera is showing from within OBS. 

https://obsproject.com/

I have the same problem. My pc doesnt have an inbuilt camera so i have purchased one but I also have a camera to demonstrate practical aspects of my art lessons. I would like to switch between the two. We use a teams platform at school for the remote teaching during this current situation.

Yes, I too want to use 2 cameras.  The laptop camera and an external one.  The user wants to do his video display and have his p.c. camera on him explaining what others are seeing.