You're looking for a way to download YouTube for Android version 4.12 patched. Here are some possible solutions:
There are several reasons why users may want to download a patched YouTube app for Android 4.1.2: download youtube for android 412 patched
Downloading YouTube for Android: Understanding the 4.12 Patched Version You're looking for a way to download YouTube
file, and select "Install anyway" if prompted by security warnings. Best Alternatives for Old Android Tablets Open the Google Play Store on your Android device
That being said, here are some possible sources to download YouTube for Android 4.12 patched:
What is YouTube 4.12 Patched?