Somesmart TVshave Chromecast compatibility built-in, while others require the purchase of a Chromecast dongle.
Heres what you’re gonna wanna know about how to watch Twitch on TV using Chromecast.
Your TVs menu system or manual should say whether it supports Chromecast streaming or not.

Turn your Chromecast-compatible smart TV on.
If youre using a Chromecast dongle, see to it its plugged in.
Tap theCasticon at the top of the app.

The Cast icon looks like a TV screen with a broadcast signal coming out of it.
Tap the name of your screen.
Tap a Twitch stream within the Twitch app to have it automatically play on your TV.

OpenGoogle Chromeon your setup, go to theTwitch website, and begin watching a stream as usual.
see to it that your gear and smart TV or Chromecast dongle are using the same Wi-Fi data pipe.
Hover your mouse cursor over the video player so that several playback buttons appear, then click theCasticon.

nudge the name of your Chromecast dongle or smart TV.
The Twitch stream should begin playing on your TV.
A blueCasticon should appear within your Google Chrome toolbar.

Here are several alternatives to Twitch TV casting with Chromecast.