Streaming on Roku. John Wick: Chapter 4, an adventure movie starring Keanu Reeves, Donnie Yen Ji-Dan, and Bill Skarsgård is available to stream now. Watch it on STARZ, DIRECTV, The Roku Channel, ROW8, Fandango at Home, Plex - Kostenlose Filme & TV, Apple TV or Prime Video on your Roku device.