SAN JOSE, Calif.–(BUSINESS WIRE)–Today Roku, Inc. (NASDAQ: ROKU) announced the Roku Premiere will be available exclusively on Black Friday at Walmart for just $19, while supplies last. The Roku Premiere provides customers with endless entertainment in HD (High Definition), 4K and HDR (High Dynamic Range) picture – and offers everything needed to stream with loved ones this holiday season. Additionally, customers will find incredible deals across Roku’s product lineup, including $12 off the 20