: Devices from this era typically run on ARMv7 (32-bit) or ARM64 (64-bit) processors.
This indicates you downloaded a version meant for a newer Android OS (like Android 6.0+), or the file download was corrupted. Double-check that you downloaded version 16.40.36.
The APK is corrupted or for a different CPU architecture. Fix: Ensure you downloaded the nodpi (universal) version. Avoid “arm64” variants if your Lollipop device is 32-bit (most are). youtube apk android 511
If you choose to use an older APK, the following were the last major versions to support the Lollipop API (API 21): Official YouTube 16.40.36
Before you begin, you must enable “Unknown Sources” on your device. Here is how: : Devices from this era typically run on
Keeping the Flame Alive: How to Get YouTube Working on Android 5.1.1 (Lollipop)
While you can't run the newest version of YouTube, certain legacy versions still function if you download them from reputable repositories like APKMirror . The APK is corrupted or for a different CPU architecture
You need a version of the YouTube app that was built for Android 5.0–5.1.1. You can find these on reputable APK repository sites (such as APKMirror or UpToDown).
Because these apps are not optimized for current YouTube servers, they may cause increased battery drain or generate higher heat. Conclusion