Quick tutorial on how to stream Showbox to your Chromecast. You’ll need the Showbox apk and the Local Cast App from Playstore which is free. Go to Settings-Security and check unknown sources then install Showbox.
New Showbox update 4.73 http://www.apkmirror.com/apk/show-box-2/show-box/show-box-4-73-release/show-box-4-73-android-apk-download/
