Google Chromecast is a streaming dongle that can be plugged into a TV or monitor using an HDMI port and stream audio and video from another device.
In the casting diagram below Chromecast functions as a cast receiver.
How Casting Works
A control device e.g. a mobile phone locates the content on the Internet e.g a YouTube video.
If the content site supports the cast protocol the control device can then cast the content to a receiver e.g a TV that also supports the cast protocol.
The streaming content goes direct to the receiver but the control device can control the streaming process.
Google Chromecast
Google chromecast is a cast receiver and plugs into an HDMI port on a TV.
Chromecast relies on The Google cast protocol which allows you to send content to a device from another controlling device that supports the cast protocol.
Locating Cast Devices
When you click on the cast icon you will be presented with a list of all devices that are capable of receiving a cast, and you select the desired target device from the list.
The cast icon maybe present in multiple locations.
If you open a YouTube video in the Google Chrome browser you will see the icon in the browser toolbar and on the video toolbar.
Common Questions and Answers
Q- I have a smart TV do I need Chromecast?
A- Probably not as smart TVs come with the popular streaming services like Netflix installed. Android TVs come with Google TV.
Q- Can you use Chromecast if you don’t have a smart TV?
A- Yes Chromecast was designed for non smart TVs
Resources and Related tutorials: