Series replaces YouTube's endless feed with one video at a time. No thumbnail grid — you read what each video is actually about, then watch it or pass. It ranks series and long-form first, hides Shorts and autoplay, and learns from what you finish vs. skip. Strict Mode locks you into a video (back/refresh/URL-proof) so you finish what you start. Blank Canvas strips everything but the player. All data stays local. Free.