Hey Bravo4,
I see that you may be experiencing issues on your Apple TV that require you to activate the Apple TV every time you wish to subscribe to a YouTube channel. This seems like it may be an issue with the YouTube app. Here is an article for you with some information about contacting troubleshooting this issue:
Apple TV: Troubleshooting third-party content providers - Apple Support
https://support.apple.com/en-au/HT200072
- Some content providers require that you activate your Apple TV with their service. Depending on the content provider, these steps can differ. Follow the onscreen instructions on your Apple TV during activation.
- Some content providers might occasionally require you to reactivate your Apple TV.
- Some content providers might require a subscription or an additional account to access content. This can include service with a cable or satellite provider. You can find more information on the content provider's site.
Take care, and thanks for visiting the Apple Support Communities.
Cheers,
Braden