There's a respondent on the page suggesting OBS, the Open Broadcaster Software. I think that's the way to go. If you need to feed it in to Zoom or Skype or some

There's a respondent on the page suggesting OBS, the Open Broadcaster Software. I think that's the way to go. If you need to feed it in to Zoom or Skype or something, you should be able to use OBS-VirtualCam (haven't tried it myself, yet) https://obsproject.com/forum/resources/obs-virtualcam.539/ https://obsproject.com/forum/resources/obs-virtualcam.539/ one camera aimed at you, and another one aimed at your desk, with some different scenes set up in OBS for focusing on you, the desk, or some powerpoint slides. then let students use the textual chat feature. (just plain superior to taking audio from 20+ students simultaneously. that'll never turn out well.)