How to Rip and Stream DVD Movies to Google Chromecast HDMI Dongle How might Chromecast Work when Streaming Movies Similarly, Google Chromecast can hook up with user’s home network through Wi-Fi; on the other hand, it plugs into the HDMI port of your HD television or monitor. The electricity is by connecting the device's micro-USB port to an external power supply or maybe a USB port. These things are required when you need to play audio video with Chromecast: Wi-Fi connection; another power or perhaps a USB port; a PC or Mac; Chromecast-enabled mobile/web apps movie file(s)