As of 2026, Android 5.1.1 (Lollipop) is an obsolete operating system that is no longer officially supported by Google
As Google pushes newer Android versions, devices running Android 5.1.1 (API 22) have been left behind. The official YouTube app now requires Android 8.0+ for the latest builds.
: The app may prompt for an update that is not available in the Google Play Store for that version of Android.