@tommy There is one more problem when the same url is opened in an Iframe on a HTTPS site as below.
<iframe src=“https://zoom.us/wc/meeting_id/join?prefer=1&un=YWRlZWw=”>
Error:
There is a blank page being displayed instead of the Zoom window and this is the error in console.
Mixed Content: The page at ‘https://elearningevolve.com/wordpress-zoom-demo’
was loaded over HTTPS, but requested an insecure frame ‘http://zoom.us/wc/join/791081830?tk=&prefer=1&track_id=&meeting_result=&jmf_code=&wpk=&_x_zm_rtaid=ic2OTLUhTGeeRNV0GeZueA.1588018242257.e3d8c11a807e4344102d317c33c335e0&_x_zm_rhtaid=576’. This request has been blocked; the content must be served over HTTPS.
You can reproduce the issue by trying to join the meeting here,
https://elearningevolve.com/wordpress-zoom-demo