Install the initial extension: https://chrome.google.com/webstore/detail/videostream-for-google-ch/cnciopoikihiagdjbjpnocolokfelagl?hl=en
-  Go to => chrome://flags/ 
-  search for “Views Cast dialog” 
-  in the “Views Cast dialog” setting, change “Default” to “Disabled” 
-  search for “Upcoming UI features” 
-  in the “Upcoming UI features” setting, change “Default” to “Disabled” 
-  Restart chrome. The chrome cast search popup should then appear.