To use YouTube on a legacy device running iOS 5.1.1, you generally cannot use the modern official app, which now requires at least iOS 14 or later
Don't waste your time hunting for a "YouTube IPA for iOS 5.1.1." It doesn't exist in a functional state. youtube ipa for ios 511
To install YouTube on a legacy device, you usually need a decrypted IPA file. Since these are no longer on the App Store, users turn to community archives. 1. The Veterans of iOS: MTMDev To use YouTube on a legacy device running iOS 5
However, getting YouTube—the internet’s second-largest search engine—to run on a decade-old operating system is a journey fraught with digital archaeology, certificate revocations, and the ethical gray areas of "side-loading." users turn to community archives.
Simply installing the IPA is usually not enough. You must apply a "fix" to restore connectivity. :