For iOS 7.1.2, you cannot use the latest version. You need a legacy IPA file that is compatible with the 32-bit architecture of older devices.
A classic choice for legacy devices, though it often requires an app-specific password from your Apple ID. Youtube Ipa For Ios 7.1 2 Download
You can use tools like the AltStore to sign and install the IPA using your Apple ID. For iOS 7
This is widely considered the last officially compatible version for iOS 7. You can use tools like the AltStore to
Trying to get YouTube running on a device with iOS 7.1.2, like an iPhone 4, can be a bit of a challenge. Because Google no longer officially supports such an old operating system, the modern app won't even show up in your App Store updates.
An even older "classic" version often found on sites like the Internet Archive . 2. Where to Download the IPA