Finding a working YouTube APK for Android 4.4.2 (KitKat) is difficult because Google has officially ended support for this version. The current YouTube app requires Android 9.0 or higher to run properly. 

Step 4: Open and Sign In.

Clear Data/Cache: If the app crashes immediately, try going to Settings > Apps > YouTube and selecting Clear Cache and Clear Data.  Safety Warning 

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Step-by-Step Installation Guide for YouTube APK on Android 4.4.2

Prerequisites:

1. Enable Unknown Sources:
   • Package Name: com.google.android.youtube
   • Version: 17.09.35
   • Minimum API Level: 19 (Android 4.4)
   • Target API Level: 28 (Android 9)
   • Architecture: ARMv7 (works on 99% of KitKat phones) and x86 (for older Intel-based tablets)

   If the APK asks for SMS reading, Phone call management, or Root access – DELETE IT IMMEDIATELY.