here is a example on github , where you can learn how zoom works
the CDN version is ready to use with a few simple steps
CDN/js/index.js:20 var SDK_KEY = "YOUR_SDK_KEY";
CDN/js/index.js:26 var SDK_SECRET = "YOUR_SDK_SECRET";
CDN/js/index.js:112 ... "/meeting.html?" // replace '/' with './'
CDN/js/meeting.js:31 leaveUrl: "/index.html", // replace '/' with './'
here is a tutorial on youtube
you can check your signatur here
and you can decode exp and iat here
