Even on older hardware, users could upload videos and apply basic filters directly from the app. Best Modern Alternatives for Lollipop
Many users on Lollipop encounter a screen forcing them to use the website. This occurs when the app version is deemed too old by Google’s servers. Top Original Features on Android 5.1.1 youtube for android 511 top
When the app was natively supported, it introduced several "top" features that defined the Lollipop era of mobile video: Even on older hardware, users could upload videos
This is widely cited as the last relatively stable official branch for Android 5.0 and 5.1. Top Original Features on Android 5
Android 5.1 allowed users to change system volume while audio or video played in the background, a major quality-of-life improvement for viewers.
Introduction of intelligent recommendations based on viewing history directly on the main landing page.
YouTube for Android 5.1.1: Top Features and How to Stay Connected
