If you’re an Amazon Fire TV owner, it looks as though your access to the native YouTube client is coming to an end sooner than expected. Google originally stated that access to the app would be removed from Fire TV and Echo Show devices on January 1st 2018, which is next Monday. However, customers are reporting that access was revoked today.
Customers

Source: Hot Hardware – YouTube Access On Amazon Fire TV Devices Yanked Days Ahead Of Schedule