I cannot be seen by others in the zoom meeting, but every thing looks and sound fine on my screen.

HI..

My Zoom always worked fine. Using iMac. Last Monday I went onto my usual self-help meeting and everything appeared normal to me. I could see my video and hear myself. Others said that they could hear me but could not see me.   My video was definitely on.  

I used the "uninstall zoom" feature. Downloaded Zoom onto my computer again...and still no change. 

I can see and hear active video on my end....others cannot see me or i am frozen. 

My internet connection is hardwired.  Very strong and working fine in all my other usage.

I am at a loss as to what to try next. 

Thanks.