The most reliable way to find a compatible version is to search for legacy APKs that support (the technical designation for Android 4.4).
If you specifically want the last official version that supported KitKat (even if limited), you can find it on community-trusted mirror sites: Youtube Android 4.4 4 Download Apk
While downloading an APK can temporarily restore access, many users find that the app eventually fails again as YouTube's backend APIs evolve beyond what KitKat can process. Community alternatives like or using YouTube through a lightweight browser (like Opera Mini ) have become the "happier ending" for many of these older devices. The most reliable way to find a compatible
: The most reliable way to watch YouTube on Android 4.4.4 is through a web browser. Open Chrome or the built-in Android browser and go to m.youtube.com. : The most reliable way to watch YouTube on Android 4