In 2015, YouTube released version 5.1.1 of its Android app, which brought several significant updates and improvements. At the time, Android 5.1.1 (Lollipop) was the latest version of the Android operating system, and the YouTube app was optimized to take advantage of its features. The app was designed to provide a seamless video-watching experience, with features such as video recommendations, playlists, and subscriptions.
Despite the lack of official support, the community has found ways to keep "Lollipop" devices productive: The Web Alternative
The YouTube app for Android 5.1.1 offers a clean and intuitive interface, making it easy for users to navigate and find their favorite content. The app's design is consistent with Google's Material Design guidelines, providing a cohesive look and feel across all Android devices.
The mobile web version uses less RAM than the app and doesn't require constant API updates to function. You can even "Add to Home Screen" from your browser settings to create a pseudo-app icon. 3. Lightweight Alternatives (NewPipe & SkyTube)
: The last stable official versions to support Android 5.0+ (API 21) were in the series, such as version . These can be found on reputable repositories like Third-Party Clients (Recommended)