If these example pages are served over HTTPS, it is required that the target host is also accessible over HTTPS.
If you are viewing these examples from the webrtcexamples webapp shipped with the Red5 Pro Server, you should not have to worry about Cross Origin Resource Sharing (CORS) issues running from either localhost or on TLS from a remote deploy
Otherwise, if you are viewing these examples from another origin other than the target Red5 Pro Server defined as host please be sure that the required CORS settings are in place to communicate properly. More info about CORS.