You must download these as APK files from trusted sources like GitHub. Technical Workarounds
Remember how we watched vertical videos back then? Before the AI-enhanced, swipe-away interface of today, watching a vertical video on YouTube 5.1.1 was awkward. You could view it full screen (with massive black bars on the sides) or in a small window. There was no seamless "Snapchat-style" feed. It’s fascinating to see how the rise of Snapchat and later TikTok forced YouTube to completely redesign this specific aspect of their Android app just a few years later. Youtube For Android 5.1.1