Try something like:
window.mediaHost = new cast.player.api.Host({
'mediaElement': window.mediaElement,
'url': url
});
window.mediaHost.updateManifestRequestInfo = function(requestInfo) {
if (!requestInfo.url) {
requestInfo.url = this.url;
}
requestInfo.withCredentials = true;
};
window.mediaHost.updateLicenseRequestInfo = function(requestInfo) {
requestInfo.withCredentials = true;
};
window.mediaHost.updateSegmentRequestInfo = function(requestInfo) {
requestInfo.withCredentials = true;
};