Chromecast demo on v2.74


I am trying chromecast demo on chrome on this address:

Chrome version 72.0.3626.119 (Official Build) (64-bit).
OS: Mac Mojave
Console log below:

kWidget: Kaltura HTML5 Version: 2.74.1__33760b2c
jquery.min.js:4 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check
send @ jquery.min.js:4
ajax @ jquery.min.js:4
m._evalUrl @ jquery.min.js:4
domManip @ jquery.min.js:3
append @ jquery.min.js:3
(anonymous) @ doc-bootstrap.js:25
mwEmbedLoader.php:31 Allow attribute will take precedence over ‘allowfullscreen’.
I can’t see the chrome cast button.

Any suggestions?