For devices running iOS 10.3.4 , such as the iPhone 5 or iPad 4, installing a functional YouTube app requires specific legacy versions and often a "version spoofing" tweak because Google has officially discontinued support for this firmware. 1. Recommended YouTube IPA Versions
If you have previously downloaded YouTube on your Apple ID using a newer device, you can often bypass the "Unable to Purchase" error. Open the and go to Purchased . Search for "YouTube" and tap the Cloud icon . youtube ipa for ios 1034 link
: A Cydia tweak that allows the App Store to download the "Last Compatible Version" of an app for your device, bypassing the initial "Incompatible" block. For devices running iOS 10
: Most reliable fixes require your device to be jailbroken to access system files. Open the and go to Purchased