Zoom video tilted

My Zoom work place meetings video displays as tilted. I have tried the usual things, other participants videos do not appear to be tilted, MS Windows Technical Support has verified with me that my Dell Inspiron 15 laptop's camera is working fine, displaying no tilt, uninstalled and reinstalled the Zoom app, and have looked for any mention of the problem in support information provided by Zoom. Please give me a hint as to what is going on, or if you would like clarification of the problem. Thank you.