Open the YouTube app on your smart TV
Sign in to your Google account if needed
Use the TV remote to search for videos
Connect a streaming device like Chromecast, Roku, Fire TV, or Apple TV
Install the YouTube app on the streaming device
Open YouTube on your phone or tablet
Tap the Cast icon and select your TV or streaming device
Use AirPlay from an iPhone or iPad to mirror to a compatible TV or Apple TV
Use screen mirroring from an Android phone to a compatible TV
Connect a laptop to the TV with an HDMI cable
Open YouTube in a web browser on the laptop
Make sure the TV and device are on the same Wi-Fi network when casting
Adjust TV input to the correct HDMI or device source if needed