I have recently started using chromecast and its very easy to cast anything you want to display on your TV, but the app on my androide phone do not work as a remote control it only serves to cast anything I want to show from my phone. After you start casting then you can use your TV remote control to adjust volume or change colour and so on. You also need to install an extension on Chrome browser (its the only browser that support chromecast) and from that you can cast anything that you see on your laptop onto TV, once you want to stop casting click on the extension and stop it.