Open the YouTube app on your TV
Open the YouTube app on your phone or computer
Make sure both devices are connected to the same Wi-Fi network
Sign in to the same Google account on both devices
On your phone or computer, tap or click the Cast icon
Select your TV from the list of available devices
Enter the pairing code shown on the TV if prompted
Use the YouTube app on your phone or computer to choose and play videos on the TV
If needed, use HDMI to connect your device directly to the TV
If needed, use a streaming device such as Chromecast, Roku, Fire TV, or Apple TV