I am using the latest Chrome version 72 on Linux and the latest Emby server version. The chromecast icon in emby does not present an option to connect to my chromecast. Only has "my device" option, which does nothing. I also have Chromium 71 (hasn't been updated to 72) and it still works with chromecast in emby.
Chromecast is found by other video sites and youtube in Chrome 72. But in version 72, Chromecast link popup is different than in previous chrome version. Anyone else have this issue?