Or, if you want a perfect display from your computer screen use an HDMI cable to the TV. Click connect button on app and choose device. Your PC and TV (or Miracast device) must connected to the same network. You can use the Google Chromecast as a receiver. Check your TV to see if it supports Wireless Display / Miracast. It works just like Miracast, and you can mirror content from either an Android device or a Chrome browser. If you really, really need chromecast protocol, get an android TV instead of a roku or a separate chromecast device. Miracast will help you cast your PC screen to your TV or Miracast enabled device. If you are playing from files, you can use a server like Plex on your computer to send them, or put them on a USB drive to play with the roku media player, or put them on a phone or tablet and send them with the roku app. If you are playing content from the internet, chances are there is a roku app to play it directly. Generally, screen mirroring of some other device is inefficient and not the best way to view things even where it does work. YouTube/Netflix/Plex and possibly others may work this way on the roku (you'll know because the phone app itself will show the cast icon). Some applications provide their own 'casting' function where the phone app tells the TV app what content to play but the TV app gets its own copy.
![chromecast miracast chromecast miracast](https://www.notebookcheck.org/uploads/tx_nbc2/4_to_3_Teaser_Redmi_Note_10__Pro.jpg)
CHROMECAST MIRACAST WINDOWS 10
Chromecast works over your existing network connection but the screen mirroring part does not work on the roku. You can use a Chromecast on Windows 10 but only if you add Chrome as a browser. The screen mirroring that roku provides is 'miracast' which requires a wifi-direct connection between the devices, and not all PC hardware can do that.