Video Out Issue: I can see myself; I can see others, but they can't see me.

I have an HP Envy TE01-1022 desktop, 32 RAM, 2T SSD, GTX 1050Ti graphic card connected with AT&T high-speed ethernet. A PC tech checked out the system, and everything is working. I've done three clear and installs. Video conferencing works with TEAMS and Google. I've done every troubleshooting procedure I could think of or find online. I'm at wit's end.

Does anyone have a recommendation?

Thanks,

Ted