It is technically impossible to get a working, stable, secure connection to YouTube’s modern servers using that device and OS.
Host: "Now, let's head to the App Store and see if we can download YouTube directly. Unfortunately, the latest YouTube app might not be compatible with your iOS version. But don't worry, I've got a workaround for you." youtube for iphone 4 ios 712 download upd
Keep that iPhone 4 running. It represents a golden era of design and simplicity—even if YouTube requires a little extra effort to cooperate. It is technically impossible to get a working,