running iOS 7.1.2 is no longer possible through standard methods because the app now requires iOS 16 or later . On this legacy hardware, the original app will likely display errors, fail to open, or show an "incompatible" message in the App Store . Compatibility & Performance Review
[Modern iOS Device / PC with iTunes] │ ▼ (Download YouTube to register app ownership to Apple ID) [Same Apple ID on iPhone 4] │ ▼ (Access App Store -> Purchased -> Tap Cloud Icon) [Download Older Version Prompt] -> Success youtube for iphone 4 ios 712 download upd
If YouTube does not appear in your purchase history, you can "force" it into your account using an older version of iTunes on a PC or Mac. running iOS 7
You can't get the latest YouTube version. But you can get the final version of the app that was ever made for iOS 7. You can't get the latest YouTube version