How do i get my tvs pairing code?

Old fashioned TVs, the kind with a picture tube and analog tuning do not have pairing codes. Pairing codes are for bluetooth. Find the operating manual for your TV if you think it has bluetooth . Start with the manufacturer's website and search up your specific model's manual. You're talking about youtube, so maybe you have a smart TV. That still doesn't mean it has bluetooth. You need to set up your smart TV to communicate with your internet wireless router, since youtube is not an over-the-air service. I would not call a smart TV "old fashioned". If you want a better answer, provide a make and model number for your TV.