Install OBS as a virtual video switcher feeding Zoom

Install OBS

https://obsproject.com/

Install OBS Virtual Camera

https://obsproject.com/forum/resources/obs-virtualcam.539/

When asked how many virtual cameras to install, choose 1

Restart OBS

In the Scene Panel, click + to make a new scene.

Name this scene "Me Full Screen"

Now we're going to add 3 sources - the webcam, a white background, and a logo

In the source panel, click + > Color Source > white background

In the source panel, click + > Video Capture Device > webcam

Click Ok.

You can move and resize your image wherever you'd like it to be.

Right click on your image and choose filters. In the filter panel, click + and add a chroma key filter. Adjust the settings as required to cut you out from your green background.

In the source panel, click + > Image and then browse to a logo file.

You can move and resize the logo wherever you'd like it to be.

You can crop your logo by holding down ALT while dragging the edges.

In the Scene Panel, click + to make a new scene.

Name this scene "Laptop Full Screen"

In the source panel, click + > Display Capture

choose the computer monitor you want to share with students

In the Scene Panel, click + to make a new scene.

Name this scene "Me Over Laptop"

Copy (ctrl-c) & paste (ctrl-v) the laptop element from scene "Laptop Full Screen" you created above

Copy (ctrl-c) & paste (ctrl-v) the webcam element from scene "Me Full Screen" you created above

Whenever you start OBS, click Tools > VirtualCam to turn on the output from OBS to other apps on your computer

Set Target Camera to "OBS-Camera"

Click Start

Click X to close the window

In your streaming app (zoom, skype, teams, etc) set your webcam source to be OBS-Camera

In Zoom > click on your image in the top right > Settings > Video

Set Camera to "OBS-Camera"