Make sure your phone and TV are connected to the same Wi-Fi network
Open the YouTube app on your phone
Tap the Cast icon
Select your TV or streaming device from the list
Open a video and it will play on the TV
Use your phone to pause, play, skip, or adjust volume
If the Cast icon does not appear, update the YouTube app
If needed, restart your phone, TV, and Wi-Fi router
For smart TVs, sign in to the same Google account on both devices
If using an HDMI adapter, connect your phone to the TV with the adapter and cable