YouTube is reportedly pivoting away from its premium subscription tier just eight months after it launched. YouTube’s original programming, which includes shows such as the “Karate Kid” spinoff “Cobra Kai,” will be available to all viewers, with ads, starting in 2019, Business Insider reported Tuesday. Separately, the Hollywood Reporter said Tuesday that the unit of Alphabet Inc.’s Google will scale back its production of scripted content starting in 2020. While neither reported YouTube Premium — the $11.99-a-month subscription service — would close, it is unclear how many viewers would continue to pay, when the same content would be available for free, though with ads