1. Firstly, open your streaming device or Smart TV
2. then open the YouTube app
3. Now click on Settings
4. Visit tv.youtube.com/start/enter with TV code. You will see a TV code, Note down correctly.
5. Open YouTube App on your mobile.
6. Visit your profile settings
7. Click on Watch on TV
8. Click on entering TV code
9. Now enter the code you note down in step 4.