If you attempt to download the YouTube APK (the installation file) from a third-party archive like APKMirror and install it on Jelly Bean, the installation will fail. Modern versions of the YouTube app require newer Android frameworks and permissions that simply do not exist in the 4.1.2 architecture. The digital door has been bolted shut from the inside.
You must search for and download the APK (specifically tailored for Android 4.4 and older) from a trusted repository like GitHub or F-Droid. 2. Custom ROMs android 4.1.2 youtube
Anyway to get YouTube working on a tablet that runs Android 4.1.2? If you attempt to download the YouTube APK