Hi @Kathy7 thank you and I appreciate you working with us to sort this out. We may need to open a support case to dig deeper with you but there is one more thing I thought of. Can you take a look at your video settings in the Zoom client, especially at the bottom click "Advanced"
We may need to tweak these settings and see if we can find a winning combination. If you could try a setting, test again, and then make changes one at a time to see which setting could be impacting this issue?