Thanks for your reports about YouTube, YouTube TV and YouTube Music access issues. We're working on resolving this and will let you know once fixed. We apologize for any inconvenience this may cause and will keep you updated.
Noted! Double check your bell settings for the channel and make sure you've opted-in to receive all notifications and not just "occassional". After that, make sure your app and device settings are turned on: https://goo.gl/UCRcbp . Let us know if things still aren't working.