If you boot up one of these devices today, you will quickly notice that modern apps are entirely missing from the App Store. The original pre-installed YouTube app built by Apple returns a permanent connection error. The official Google YouTube app requires much newer versions of iOS.
The last compatible version of the official YouTube app for iOS 5.1.1 was YouTube 1.3.0 (or similar versions from 2012-2013). However, this version relies on legacy Google APIs that have been shut down for years. As a result, even if you install it, the app will likely show an error message ("Connection Error" or "Update Required") and will not play videos. youtube ipa for ios 511
You cannot install a legacy IPA file onto iOS 5.1.1 out of the box. You must prepare your device with specific tools. If you boot up one of these devices