Modern users complain about YouTube forcing vertical short-form content. In version 5.9.0.13, there were no Shorts. There were no "Products" tabs. No "Community Posts." It was simply a —exactly what most people wanted.
A Deep Dive into YouTube Version 5.9.0.13: The Golden Era of Android Streaming youtube version 5.9.0.13
While limited compared to today’s Premium features, v5.9.0.13 introduced early support for saving videos offline in certain countries—a big deal back then. youtube version 5.9.0.13
Version 5.9 was famous for introducing the "Cards" interface. youtube version 5.9.0.13