"To sign up for an Annual Plan, you must be:
A new YouTube Premium or Music Premium subscriber. If you are already subscribed to YouTube Premium or YouTube Music and want to switch to an Annual Plan, learn how to do so below.
An individual subscriber. Student and family plans are not eligible.
Located in any of the following locations:
United States, Canada, Mexico, Brazil, Russia, Turkey, Germany, Thailand, India, and Japan.
Note for India subscribers: If you have a 1 month or 3 month prepaid plan, you can sign up for an Annual Plan that will begin when your prepaid plan expires."
https://support.google.com/youtube/a...11417260?hl=en